Update dev dependencies

- isort@5.6.4
- flake8@3.8.4
- flake8-bugbear@20.11.1

.pre-commit-config.yaml

@@ -12,15 +12,15 @@ repos:
       types: [python]
       language_version: python3
 - repo: https://gitlab.com/pycqa/flake8
-  rev: 3.8.3
+  rev: 3.8.4
   hooks:
     - id: flake8
       name: "Lint python files"
       types: [python]
       language_version: python3
-      additional_dependencies: ['flake8-bugbear==20.1.4']
+      additional_dependencies: ['flake8-bugbear==20.11.1']
 - repo: https://github.com/timothycrosley/isort
-  rev: 5.1.4
+  rev: 5.6.4
   hooks:
     - id: isort
       name: "Sort python imports"

setup.py

@@ -49,10 +49,10 @@
             "tox>=3.5.3,<4.0",
             # linting
             "flake8>=3.0,<4.0",
-            'isort>=5.1.4,<6.0;python_version>="3.6"',
+            'isort>=5.6.4,<6.0;python_version>="3.6"',
             'black==20.8b1;python_version>="3.6"',
             # flake-bugbear requires py3.6+
-            'flake8-bugbear==20.1.4;python_version>="3.6"',
+            'flake8-bugbear==20.11.1;python_version>="3.6"',
             # testing
             "pytest<5.0",
             "pytest-cov<3.0",