diff --git a/poetry.lock b/poetry.lock
index ed03106..db59d45 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,54 +1,53 @@
 [[package]]
-category = "dev"
-description = "A configurable sidebar-enabled Sphinx theme"
 name = "alabaster"
+version = "0.7.12"
+description = "A configurable sidebar-enabled Sphinx theme"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.7.12"
 
 [[package]]
-category = "dev"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.4"
 
 [[package]]
-category = "dev"
-description = "An unobtrusive argparse wrapper with natural syntax"
 name = "argh"
+version = "0.26.2"
+description = "An unobtrusive argparse wrapper with natural syntax"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.26.2"
 
 [[package]]
-category = "dev"
-description = "Utilities for refactoring imports in python-like syntax."
 name = "aspy.refactor-imports"
+version = "2.1.1"
+description = "Utilities for refactoring imports in python-like syntax."
+category = "dev"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.1.1"
 
 [package.dependencies]
 cached-property = "*"
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.4.0"
 
 [[package]]
-category = "dev"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "19.3.0"
+description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
 
 [package.extras]
 azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
@@ -57,38 +56,38 @@ docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "dev"
-description = "Internationalization utilities"
 name = "babel"
+version = "2.8.0"
+description = "Internationalization utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8.0"
 
 [package.dependencies]
 pytz = ">=2015.7"
 
 [[package]]
-category = "dev"
-description = "Security oriented static analyser for python code."
 name = "bandit"
+version = "1.6.2"
+description = "Security oriented static analyser for python code."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.6.2"
 
 [package.dependencies]
+colorama = {version = ">=0.3.9", markers = "platform_system == \"Windows\""}
 GitPython = ">=1.0.1"
 PyYAML = ">=3.13"
-colorama = ">=0.3.9"
 six = ">=1.10.0"
 stevedore = ">=1.20.0"
 
 [[package]]
-category = "dev"
-description = "The uncompromising code formatter."
 name = "black"
+version = "19.10b0"
+description = "The uncompromising code formatter."
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "19.10b0"
 
 [package.dependencies]
 appdirs = "*"
@@ -103,101 +102,98 @@ typed-ast = ">=1.4.0"
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
-category = "dev"
-description = "A decorator for caching properties in classes."
 name = "cached-property"
+version = "1.5.1"
+description = "A decorator for caching properties in classes."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.5.1"
 
 [[package]]
-category = "dev"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2020.6.20"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2020.6.20"
 
 [[package]]
-category = "dev"
-description = "Validate configuration and produce human readable error messages."
 name = "cfgv"
+version = "3.1.0"
+description = "Validate configuration and produce human readable error messages."
+category = "dev"
 optional = false
 python-versions = ">=3.6.1"
-version = "3.1.0"
 
 [[package]]
-category = "dev"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "main"
-description = "Composable command line interface toolkit"
 name = "click"
+version = "7.1.2"
+description = "Composable command line interface toolkit"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "7.1.2"
 
 [[package]]
-category = "dev"
-description = "Cross-platform colored terminal text."
-marker = "platform_system == \"Windows\" or sys_platform == \"win32\""
 name = "colorama"
+version = "0.4.3"
+description = "Cross-platform colored terminal text."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.2.1"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.2.1"
 
 [package.dependencies]
-[package.dependencies.toml]
-optional = true
-version = "*"
+toml = {version = "*", optional = true, markers = "extra == \"toml\""}
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
-category = "dev"
-description = "A utility for ensuring Google-style docstrings stay up to date with the source code."
 name = "darglint"
+version = "1.5.2"
+description = "A utility for ensuring Google-style docstrings stay up to date with the source code."
+category = "dev"
 optional = false
 python-versions = ">=3.5,<4.0"
-version = "1.5.2"
 
 [[package]]
-category = "dev"
-description = "Distribution utilities"
 name = "distlib"
+version = "0.3.1"
+description = "Distribution utilities"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.3.1"
 
 [[package]]
-category = "dev"
-description = "Docutils -- Python Documentation Utilities"
 name = "docutils"
+version = "0.16"
+description = "Docutils -- Python Documentation Utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.16"
 
 [[package]]
-category = "dev"
-description = "A parser for Python dependency files"
 name = "dparse"
+version = "0.5.1"
+description = "A parser for Python dependency files"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "0.5.1"
 
 [package.dependencies]
 packaging = "*"
@@ -208,37 +204,34 @@ toml = "*"
 pipenv = ["pipenv"]
 
 [[package]]
-category = "dev"
-description = "A platform independent file lock."
 name = "filelock"
+version = "3.0.12"
+description = "A platform independent file lock."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "3.0.12"
 
 [[package]]
-category = "dev"
-description = "the modular source code checker: pep8 pyflakes and co"
 name = "flake8"
+version = "3.8.3"
+description = "the modular source code checker: pep8 pyflakes and co"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "3.8.3"
 
 [package.dependencies]
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 mccabe = ">=0.6.0,<0.7.0"
 pycodestyle = ">=2.6.0a1,<2.7.0"
 pyflakes = ">=2.2.0,<2.3.0"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = "*"
-
 [[package]]
-category = "dev"
-description = "Automated security testing with bandit and flake8."
 name = "flake8-bandit"
+version = "2.1.2"
+description = "Automated security testing with bandit and flake8."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.1.2"
 
 [package.dependencies]
 bandit = "*"
@@ -247,109 +240,108 @@ flake8-polyfill = "*"
 pycodestyle = "*"
 
 [[package]]
-category = "dev"
-description = "A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don't belong in pyflakes and pycodestyle."
 name = "flake8-bugbear"
+version = "20.1.4"
+description = "A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don't belong in pyflakes and pycodestyle."
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "20.1.4"
 
 [package.dependencies]
 attrs = ">=19.2.0"
 flake8 = ">=3.0.0"
 
 [[package]]
-category = "dev"
-description = "Extension for flake8 which uses pydocstyle to check docstrings"
 name = "flake8-docstrings"
+version = "1.5.0"
+description = "Extension for flake8 which uses pydocstyle to check docstrings"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.5.0"
 
 [package.dependencies]
 flake8 = ">=3"
 pydocstyle = ">=2.1"
 
 [[package]]
-category = "dev"
-description = "Polyfill package for Flake8 plugins"
 name = "flake8-polyfill"
+version = "1.0.2"
+description = "Polyfill package for Flake8 plugins"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.2"
 
 [package.dependencies]
 flake8 = "*"
 
 [[package]]
-category = "dev"
-description = "Python docstring reStructuredText (RST) validator"
 name = "flake8-rst-docstrings"
+version = "0.0.13"
+description = "Python docstring reStructuredText (RST) validator"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.0.13"
 
 [package.dependencies]
 flake8 = ">=3.0.0"
 restructuredtext_lint = "*"
 
 [[package]]
-category = "dev"
-description = "Git Object Database"
 name = "gitdb"
+version = "4.0.5"
+description = "Git Object Database"
+category = "dev"
 optional = false
 python-versions = ">=3.4"
-version = "4.0.5"
 
 [package.dependencies]
 smmap = ">=3.0.1,<4"
 
 [[package]]
-category = "dev"
-description = "Python Git Library"
 name = "gitpython"
+version = "3.1.3"
+description = "Python Git Library"
+category = "dev"
 optional = false
 python-versions = ">=3.4"
-version = "3.1.3"
 
 [package.dependencies]
 gitdb = ">=4.0.1,<5"
 
 [[package]]
-category = "dev"
-description = "File identification library for Python"
 name = "identify"
+version = "1.4.21"
+description = "File identification library for Python"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "1.4.21"
 
 [package.extras]
 license = ["editdistance"]
 
 [[package]]
-category = "dev"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.10"
 
 [[package]]
-category = "dev"
-description = "Getting image size from png/jpeg/jpeg2000/gif file"
 name = "imagesize"
+version = "1.2.0"
+description = "Getting image size from png/jpeg/jpeg2000/gif file"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.2.0"
 
 [[package]]
-category = "dev"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.7.0"
+description = "Read metadata from Python packages"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.7.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -359,37 +351,34 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
-category = "dev"
-description = "Read resources from Python packages"
-marker = "python_version < \"3.7\""
 name = "importlib-resources"
+version = "3.0.0"
+description = "Read resources from Python packages"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "3.0.0"
 
 [package.dependencies]
-[package.dependencies.zipp]
-python = "<3.8"
-version = ">=0.4"
+zipp = {version = ">=0.4", markers = "python_version < \"3.8\""}
 
 [package.extras]
 docs = ["sphinx", "rst.linker", "jaraco.packaging"]
 
 [[package]]
-category = "dev"
-description = "iniconfig: brain-dead simple config-ini parsing"
 name = "iniconfig"
+version = "1.0.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [[package]]
-category = "dev"
-description = "A very fast and expressive template engine."
 name = "jinja2"
+version = "2.11.2"
+description = "A very fast and expressive template engine."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.11.2"
 
 [package.dependencies]
 MarkupSafe = ">=0.23"
@@ -398,51 +387,48 @@ MarkupSafe = ">=0.23"
 i18n = ["Babel (>=0.8)"]
 
 [[package]]
-category = "dev"
-description = "Python LiveReload is an awesome tool for web developers"
 name = "livereload"
+version = "2.6.2"
+description = "Python LiveReload is an awesome tool for web developers"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.6.2"
 
 [package.dependencies]
 six = "*"
-
-[package.dependencies.tornado]
-python = ">=2.8"
-version = "*"
+tornado = {version = "*", markers = "python_version > \"2.7\""}
 
 [[package]]
-category = "dev"
-description = "Safely add untrusted strings to HTML/XML markup."
 name = "markupsafe"
+version = "1.1.1"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "1.1.1"
 
 [[package]]
-category = "dev"
-description = "McCabe checker, plugin for flake8"
 name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.6.1"
 
 [[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "8.4.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "8.4.0"
 
 [[package]]
-category = "dev"
-description = "Optional static typing for Python"
 name = "mypy"
+version = "0.782"
+description = "Optional static typing for Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "0.782"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
@@ -453,191 +439,184 @@ typing-extensions = ">=3.7.4"
 dmypy = ["psutil (>=4.0)"]
 
 [[package]]
-category = "dev"
-description = "Experimental type system extensions for programs checked with the mypy typechecker."
 name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.4.3"
 
 [[package]]
-category = "dev"
-description = "Node.js virtual environment builder"
 name = "nodeenv"
+version = "1.4.0"
+description = "Node.js virtual environment builder"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.0"
 
 [[package]]
-category = "dev"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "20.4"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.4"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "dev"
-description = "Utility library for gitignore style pattern matching of file paths."
 name = "pathspec"
+version = "0.8.0"
+description = "Utility library for gitignore style pattern matching of file paths."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.8.0"
 
 [[package]]
-category = "dev"
-description = "File system general utilities"
 name = "pathtools"
+version = "0.1.2"
+description = "File system general utilities"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.1.2"
 
 [[package]]
-category = "dev"
-description = "Python Build Reasonableness"
 name = "pbr"
+version = "5.4.5"
+description = "Python Build Reasonableness"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "5.4.5"
 
 [[package]]
-category = "dev"
-description = "Check PEP-8 naming conventions, plugin for flake8"
 name = "pep8-naming"
+version = "0.11.1"
+description = "Check PEP-8 naming conventions, plugin for flake8"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.11.1"
 
 [package.dependencies]
 flake8-polyfill = ">=1.0.2,<2"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "Utility that helps with local TCP ports managment. It can find an unused TCP localhost port and remember the association."
 name = "port-for"
+version = "0.3.1"
+description = "Utility that helps with local TCP ports managment. It can find an unused TCP localhost port and remember the association."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.3.1"
 
 [[package]]
-category = "dev"
-description = "A framework for managing and maintaining multi-language pre-commit hooks."
 name = "pre-commit"
+version = "2.11.1"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+category = "dev"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.6.0"
 
 [package.dependencies]
 cfgv = ">=2.0.0"
 identify = ">=1.0.0"
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+importlib-resources = {version = "*", markers = "python_version < \"3.7\""}
 nodeenv = ">=0.11.1"
 pyyaml = ">=5.1"
 toml = "*"
 virtualenv = ">=20.0.8"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = "*"
-
-[package.dependencies.importlib-resources]
-python = "<3.7"
-version = "*"
-
 [[package]]
-category = "dev"
-description = "Some out-of-the-box hooks for pre-commit."
 name = "pre-commit-hooks"
+version = "3.2.0"
+description = "Some out-of-the-box hooks for pre-commit."
+category = "dev"
 optional = false
 python-versions = ">=3.6.1"
-version = "3.2.0"
 
 [package.dependencies]
 "ruamel.yaml" = ">=0.15"
 toml = "*"
 
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.9.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.9.0"
 
 [[package]]
-category = "dev"
-description = "Python style guide checker"
 name = "pycodestyle"
+version = "2.6.0"
+description = "Python style guide checker"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.6.0"
 
 [[package]]
-category = "dev"
-description = "Python docstring style checker"
 name = "pydocstyle"
+version = "5.0.2"
+description = "Python docstring style checker"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "5.0.2"
 
 [package.dependencies]
 snowballstemmer = "*"
 
 [[package]]
-category = "dev"
-description = "passive checker of Python programs"
 name = "pyflakes"
+version = "2.2.0"
+description = "passive checker of Python programs"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.2.0"
 
 [[package]]
-category = "dev"
-description = "Pygments is a syntax highlighting package written in Python."
 name = "pygments"
+version = "2.6.1"
+description = "Pygments is a syntax highlighting package written in Python."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "2.6.1"
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.7"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "6.0.1"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "6.0.1"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 more-itertools = ">=4.0.0"
 packaging = "*"
@@ -645,56 +624,52 @@ pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa_mypy = ["mypy (0.780)"]
+checkqa_mypy = ["mypy (==0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "World timezone definitions, modern and historical"
 name = "pytz"
+version = "2020.1"
+description = "World timezone definitions, modern and historical"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2020.1"
 
 [[package]]
-category = "dev"
-description = "YAML parser and emitter for Python"
 name = "pyyaml"
+version = "5.3.1"
+description = "YAML parser and emitter for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "5.3.1"
 
 [[package]]
-category = "dev"
-description = "Alternative regular expression module, to replace re."
 name = "regex"
+version = "2020.6.8"
+description = "Alternative regular expression module, to replace re."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2020.6.8"
 
 [[package]]
-category = "dev"
-description = "Tool for reordering python imports"
 name = "reorder-python-imports"
+version = "2.3.5"
+description = "Tool for reordering python imports"
+category = "dev"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.3.5"
 
 [package.dependencies]
 "aspy.refactor-imports" = ">=2.1.0"
 
 [[package]]
-category = "dev"
-description = "Python HTTP for Humans."
 name = "requests"
+version = "2.24.0"
+description = "Python HTTP for Humans."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.24.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
@@ -704,103 +679,98 @@ urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
-category = "dev"
-description = "reStructuredText linter"
 name = "restructuredtext-lint"
+version = "1.3.1"
+description = "reStructuredText linter"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.3.1"
 
 [package.dependencies]
 docutils = ">=0.11,<1.0"
 
 [[package]]
-category = "dev"
-description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order"
 name = "ruamel.yaml"
+version = "0.16.10"
+description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.16.10"
 
 [package.dependencies]
-[package.dependencies."ruamel.yaml.clib"]
-python = "<3.9"
-version = ">=0.1.2"
+"ruamel.yaml.clib" = {version = ">=0.1.2", markers = "platform_python_implementation == \"CPython\" and python_version < \"3.9\""}
 
 [package.extras]
 docs = ["ryd"]
 jinja2 = ["ruamel.yaml.jinja2 (>=0.2)"]
 
 [[package]]
-category = "dev"
-description = "C version of reader, parser and emitter for ruamel.yaml derived from libyaml"
-marker = "platform_python_implementation == \"CPython\" and python_version < \"3.9\""
 name = "ruamel.yaml.clib"
+version = "0.2.0"
+description = "C version of reader, parser and emitter for ruamel.yaml derived from libyaml"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.2.0"
 
 [[package]]
-category = "dev"
-description = "Checks installed dependencies for known vulnerabilities."
 name = "safety"
+version = "1.9.0"
+description = "Checks installed dependencies for known vulnerabilities."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.9.0"
 
 [package.dependencies]
 Click = ">=6.0"
 dparse = ">=0.5.1"
 packaging = "*"
 requests = "*"
-setuptools = "*"
 
 [[package]]
-category = "dev"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.15.0"
 
 [[package]]
-category = "dev"
-description = "A pure Python implementation of a sliding window memory map manager"
 name = "smmap"
+version = "3.0.4"
+description = "A pure Python implementation of a sliding window memory map manager"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.0.4"
 
 [[package]]
-category = "dev"
-description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
 name = "snowballstemmer"
+version = "2.0.0"
+description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.0.0"
 
 [[package]]
-category = "dev"
-description = "Python documentation generator"
 name = "sphinx"
+version = "3.2.0"
+description = "Python documentation generator"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "3.2.0"
 
 [package.dependencies]
-Jinja2 = ">=2.3"
-Pygments = ">=2.0"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
-colorama = ">=0.3.5"
+colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
 docutils = ">=0.12"
 imagesize = "*"
+Jinja2 = ">=2.3"
 packaging = "*"
+Pygments = ">=2.0"
 requests = ">=2.5.0"
-setuptools = "*"
 snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
 sphinxcontrib-devhelp = "*"
@@ -815,194 +785,188 @@ lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-s
 test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
 
 [[package]]
-category = "dev"
-description = "Watch a Sphinx directory and rebuild the documentation when a change is detected. Also includes a livereload enabled web server."
 name = "sphinx-autobuild"
+version = "0.7.1"
+description = "Watch a Sphinx directory and rebuild the documentation when a change is detected. Also includes a livereload enabled web server."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.7.1"
 
 [package.dependencies]
-PyYAML = ">=3.10"
 argh = ">=0.24.1"
 livereload = ">=2.3.0"
 pathtools = ">=0.1.2"
 port-for = "0.3.1"
+PyYAML = ">=3.10"
 tornado = ">=3.2"
 watchdog = ">=0.7.1"
 
 [[package]]
-category = "dev"
-description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
 name = "sphinxcontrib-applehelp"
+version = "1.0.2"
+description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.2"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
 [[package]]
-category = "dev"
-description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
 name = "sphinxcontrib-devhelp"
+version = "1.0.2"
+description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.2"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
 [[package]]
-category = "dev"
-description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
 name = "sphinxcontrib-htmlhelp"
+version = "1.0.3"
+description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.3"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest", "html5lib"]
 
 [[package]]
-category = "dev"
-description = "A sphinx extension which renders display math in HTML via JavaScript"
 name = "sphinxcontrib-jsmath"
+version = "1.0.1"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
 name = "sphinxcontrib-qthelp"
+version = "1.0.3"
+description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.3"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
 [[package]]
-category = "dev"
-description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
 name = "sphinxcontrib-serializinghtml"
+version = "1.1.4"
+description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.1.4"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
 [[package]]
-category = "dev"
-description = "Manage dynamic plugins for Python applications"
 name = "stevedore"
+version = "2.0.0"
+description = "Manage dynamic plugins for Python applications"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "2.0.0"
 
 [package.dependencies]
 pbr = ">=2.0.0,<2.1.0 || >2.1.0"
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.1"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.1"
 
 [[package]]
-category = "dev"
-description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
 name = "tornado"
+version = "6.0.4"
+description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
+category = "dev"
 optional = false
 python-versions = ">= 3.5"
-version = "6.0.4"
 
 [[package]]
-category = "dev"
-description = "a fork of Python 2 and 3 ast modules with type comment support"
 name = "typed-ast"
+version = "1.4.1"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.1"
 
 [[package]]
-category = "dev"
-description = "Run-time type checker for Python"
 name = "typeguard"
+version = "2.9.1"
+description = "Run-time type checker for Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5.3"
-version = "2.9.1"
 
 [package.extras]
 doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
 test = ["pytest", "typing-extensions"]
 
 [[package]]
-category = "dev"
-description = "Backported and Experimental Type Hints for Python 3.5+"
 name = "typing-extensions"
+version = "3.7.4.2"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "3.7.4.2"
 
 [[package]]
-category = "dev"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
 name = "urllib3"
+version = "1.25.9"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "1.25.9"
 
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
-category = "dev"
-description = "Virtual Python Environment builder"
 name = "virtualenv"
+version = "20.0.26"
+description = "Virtual Python Environment builder"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "20.0.26"
 
 [package.dependencies]
 appdirs = ">=1.4.3,<2"
 distlib = ">=0.3.1,<1"
 filelock = ">=3.0.0,<4"
+importlib-metadata = {version = ">=0.12,<2", markers = "python_version < \"3.8\""}
+importlib-resources = {version = ">=1.0", markers = "python_version < \"3.7\""}
 six = ">=1.9.0,<2"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12,<2"
-
-[package.dependencies.importlib-resources]
-python = "<3.7"
-version = ">=1.0"
-
 [package.extras]
 docs = ["sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)", "proselint (>=0.10.2)"]
 testing = ["pytest (>=4)", "coverage (>=5)", "coverage-enable-subprocess (>=1)", "pytest-xdist (>=1.31.0)", "pytest-mock (>=2)", "pytest-env (>=0.6.2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "pytest-freezegun (>=0.4.1)", "flaky (>=3)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
 
 [[package]]
-category = "dev"
-description = "Filesystem events monitoring"
 name = "watchdog"
+version = "0.10.3"
+description = "Filesystem events monitoring"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.3"
 
 [package.dependencies]
 pathtools = ">=0.1.1"
@@ -1011,12 +975,12 @@ pathtools = ">=0.1.1"
 watchmedo = ["PyYAML (>=3.10)", "argh (>=0.24.1)"]
 
 [[package]]
-category = "dev"
-description = "A rewrite of the builtin doctest module"
 name = "xdoctest"
+version = "0.13.0"
+description = "A rewrite of the builtin doctest module"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.13.0"
 
 [package.dependencies]
 six = "*"
@@ -1027,21 +991,21 @@ optional = ["pygments", "colorama"]
 tests = ["pytest", "pytest-cov", "codecov", "scikit-build", "cmake", "ninja", "pybind11"]
 
 [[package]]
-category = "dev"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "3.1.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "3.1.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "1e27443d291abbbd2061b8822148e5d28b53bea27f26f039965e7a42e09c1075"
+lock-version = "1.1"
 python-versions = "^3.6.1"
+content-hash = "8e218909197ad437d44e9dc4fceba546077319ea9df17871ad5287c32740ff3a"
 
 [metadata.files]
 alabaster = [
@@ -1240,20 +1204,39 @@ markupsafe = [
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     {file = "MarkupSafe-1.1.1-cp35-cp35m-win_amd64.whl", hash = "sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d"},
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+    {file = "MarkupSafe-1.1.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5"},
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+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:3b8a6499709d29c2e2399569d96719a1b21dcd94410a586a18526b143ec8470f"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:84dee80c15f1b560d55bcfe6d47b27d070b4681c699c572af2e3c7cc90a3b8e0"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:b1dba4527182c95a0db8b6060cc98ac49b9e2f5e64320e2b56e47cb2831978c7"},
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@@ -1314,8 +1298,8 @@ port-for = [
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 pre-commit-hooks = [
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@@ -1364,6 +1348,8 @@ pyyaml = [
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+    {file = "PyYAML-5.3.1-cp39-cp39-win32.whl", hash = "sha256:ad9c67312c84def58f3c04504727ca879cb0013b2517c85a9a253f0cb6380c0a"},
+    {file = "PyYAML-5.3.1-cp39-cp39-win_amd64.whl", hash = "sha256:6034f55dab5fea9e53f436aa68fa3ace2634918e8b5994d82f3621c04ff5ed2e"},
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 ]
 regex = [
@@ -1500,19 +1486,28 @@ typed-ast = [
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     {file = "typed_ast-1.4.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"},
+    {file = "typed_ast-1.4.1-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:fcf135e17cc74dbfbc05894ebca928ffeb23d9790b3167a674921db19082401f"},
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 typeguard = [
diff --git a/pyproject.toml b/pyproject.toml
index e77baa2..bf042a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ typeguard = "^2.9.1"
 xdoctest = "^0.13.0"
 sphinx = "^3.2.0"
 sphinx-autobuild = "^0.7.1"
-pre-commit = "^2.6.0"
+pre-commit = "^2.11.1"
 flake8 = "^3.8.3"
 black = "^19.10b0"
 flake8-bandit = "^2.1.2"