Add Python 3.11 support

.github/workflows/packaging.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.11]
 
     steps:
     - uses: actions/checkout@v1

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
           - macos-latest  # macOS-10.15
           - windows-2016
           - windows-latest  # windows-2019
-        python-version: [3.7, 3.8, 3.9, '3.10', pypy-3.7]
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11', pypy-3.7, pypy-3.8, pypy-3.9]
 
     steps:
     - uses: actions/checkout@v1
@@ -34,12 +34,12 @@ jobs:
     - name: Test with tox
       run: tox
     - name: Upload coverage.xml
-      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.9' }}
+      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
       uses: actions/upload-artifact@v2
       with:
         name: tox-gh-actions-coverage
         path: coverage.xml
         if-no-files-found: error
     - name: Upload coverage.xml to codecov
-      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.9' }}
+      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
       uses: codecov/codecov-action@v1

setup.cfg

@@ -27,6 +27,7 @@ classifiers =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Software Development :: Testing
@@ -78,14 +79,15 @@ envlist =
     black
     flake8
     mypy
-    {py37,py38,py39,py310,pypy2,pypy3}-toxlatest
+    {py37,py38,py39,py310,py311,pypy2,pypy3}-toxlatest
 
 [gh-actions]
 python =
     3.7: py37
-    3.8: py38, black, flake8
-    3.9: py39, mypy
-    3.10: py310
+    3.8: py38
+    3.9: py39
+    3.10: py310, black, flake8, mypy
+    3.11: py311
     pypy-2: pypy2
     pypy-3: pypy3