Add Python 3.10 support, drop Python 3.6 support

Signed-off-by: Stephen Finucane <[email protected]>

.github/workflows/ci.yaml

@@ -10,10 +10,10 @@ jobs:
     steps:
       - name: Checkout source code
         uses: actions/checkout@v2
-      - name: Set up Python 3.9
+      - name: Set up Python 3.10
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Install dependencies
         run: python -m pip install tox
       - name: Run tox
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [3.6, 3.7, 3.8, 3.9]
+        python: ["3.7", "3.8", "3.9", "3.10"]
     steps:
       - name: Checkout source code
         uses: actions/checkout@v2
@@ -44,10 +44,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-      - name: Set up Python 3.9
+      - name: Set up Python 3.10
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Install dependencies
         run: python -m pip install tox
       - name: Build docs (via tox)
@@ -68,10 +68,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-      - name: Set up Python 3.9
+      - name: Set up Python 3.10
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Install dependencies
         run: python -m pip install build
       - name: Build a binary wheel and a source tarball

setup.cfg

@@ -21,7 +21,7 @@ classifiers =
     Programming Language :: Python
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-python_requires = >=3.6
+python_requires = >=3.7
 keywords = sphinx
 
 [files]

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py{36,37,38,39}-click{7,8},style,docs
+envlist = py{37,38,39}-click{7,8},py{310}-click8,style,docs
 
 [testenv]
 deps =