✅ add test support for Python 3.10

Author: brutus

.github/workflows/coverage.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Install dependencies
         run: >-
           pip install

.github/workflows/test.yml

@@ -14,6 +14,7 @@ jobs:
           - "3.7"
           - "3.8"
           - "3.9"
+          - "3.10"
     steps:
       - name: Checkout Source
         uses: actions/checkout@v1

changes/_zCfgFuekQ.feature.md

@@ -0,0 +1 @@
+:white_check_mark: add support for Python `3.10`

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,coverage
+envlist = py37,py38,py39,py310,coverage
 isolated_build = True
 skip_missing_interpreters = True
 
@@ -14,7 +14,7 @@ commands =
 	python -m unittest {posargs:discover}
 
 [testenv:coverage]
-basepython = python3.9
+basepython = python3.10
 commands =
 	coverage run -m unittest discover
 	coverage report
@@ -24,3 +24,4 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310