Add support for Python 3.10.

Author: dave-shawley

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install python
         uses: actions/setup-python@v2.2.2
         with:
-          python-version: 3.9
+          python-version: "3.x"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.7, 3.8, 3.9]
+        python-version: [2.7, 3.7, 3.8, 3.9, "3.10"]
     steps:
       - uses: actions/checkout@v2
       - name: Install python ${{matrix.python-version}}
@@ -70,7 +70,7 @@ jobs:
       - name: Install python
         uses: actions/setup-python@v2.2.2
         with:
-          python-version: 3.9
+          python-version: "3.x"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools twine

docs/history.rst

@@ -8,6 +8,7 @@ Release History
 - Integrate with codecov.io.
 - Adopt the Contributor Covenant.
 - Add ``jsonscribe.config`` module.
+- Advertise support for 3.10
 
 2.0.0 (11-May-2021)
 -------------------

setup.py

@@ -38,5 +38,6 @@
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
     ],
 )

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = lint,py27,py37,py39
+envlist = lint,py27,py37,py39,py310
 toxworkdir = ./build/tox
 
 [testenv]