Confirm support for Python 3.10.

.github/workflows/main.yml

@@ -28,7 +28,7 @@ jobs:
           python: 3.9
           toxenv: py
         - os: ubuntu-latest
-          python: '3.10.0-alpha - 3.10.999'
+          python: "3.10"
           toxenv: py
         # windows
         - os: windows-latest

docs/source/user/using-plugins.rst

@@ -25,7 +25,7 @@ appropriate of:
     pip3 install <plugin-name>
     python -m pip install <plugin-name>
     python3 -m pip install <plugin-name>
-    python3.9 -m pip install <plugin-name>
+    python3.10 -m pip install <plugin-name>
 
 To install the plugin, where ``<plugin-name>`` is the package name on PyPI_.
 To verify installation use:

example-plugin/setup.py

@@ -23,6 +23,7 @@ setuptools.setup(
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Software Development :: Quality Assurance",
     ],

setup.cfg

@@ -25,6 +25,7 @@ classifiers =
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
     Topic :: Software Development :: Libraries :: Python Modules
     Topic :: Software Development :: Quality Assurance
 

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion=2.3.1
-envlist = py36,py37,py38,flake8,linters,docs
+envlist = py36,py37,py38,py39,py310,flake8,linters,docs
 
 [testenv]
 deps =