chore: Support Python 3.11 (#841)

Author: congminh1254

.github/workflows/build.yml

@@ -19,6 +19,7 @@ jobs:
         - 'pypy-3.8'
         - '3.9'
         - '3.10'
+        - '3.11'
     name: Build with Python ${{ matrix.python-version }}
     steps:
       - name: Checkout

.github/workflows/integration-tests.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         python-version:
         - '3.6'
-        - '3.8'
+        - '3.11'
     steps:
       - name: Checkout
         uses: actions/checkout@v2

README.md

@@ -445,7 +445,7 @@ tox
 
 The tox tests include code style checks via pep8 and pylint.
 
-The tox tests are configured to run on Python 3.6, 3.7, 3.8, 3.9, 3.10
+The tox tests are configured to run on Python 3.6, 3.7, 3.8, 3.9, 3.10, 3.11
 and PyPy (our CI is configured to run PyPy tests on pypy-3.6, pypy-3.7, pypy-3.8).
 
 # Questions, Bugs, and Feature Requests?

setup.py

@@ -17,6 +17,7 @@
     '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',
     'Operating System :: OS Independent',

tox.ini

@@ -15,6 +15,7 @@ envlist =
   pypy38,
   py39,
   py310,
+  py311,
   docs,
   coverage,
   integration-tests
@@ -29,6 +30,7 @@ python =
     pypy-3.8: pypy38
     3.9: py39
     3.10: py310
+    3.11: py311
 
 [testenv]
 commands =
@@ -83,6 +85,7 @@ recreate = True
 deps =
     wheel
     setuptools
+    virtualenv<20.22.0
 allowlist_externals = rm
 
 [testenv:py36-upload]