upgrade the test matrix (#70)

* downgrade jinja if we're looking at sphinx<4.0

* test all of the new versions of sphinx

* also test on python=3.10

* run all CI jobs

* exclude the sphinx versions incompatible with py3.10

Author: keewis

.github/workflows/ci.yaml

@@ -12,9 +12,18 @@ jobs:
     runs-on: ubuntu-latest
 
     strategy:
+      fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9']
-        sphinx-version: ['3.3', '3.4', '3.5', '4.0']
+        python-version: ['3.7', '3.8', '3.9', '3.10']
+        sphinx-version: ['3.3', '3.4', '3.5', '4.0', '4.1', '4.2', '4.3', '4.4', '4.5']
+        exclude:
+          # sphinx versions incompatible with python 3.10
+          - python-version: "3.10"
+            sphinx-version: "3.5"
+          - python-version: "3.10"
+            sphinx-version: "4.0"
+          - python-version: "3.10"
+            sphinx-version: "4.1"
 
     steps:
       - name: checkout the repository
@@ -39,6 +48,9 @@ jobs:
       - name: install sphinx
         run: |
           python -m pip install "sphinx==${{matrix.sphinx-version}}"
+          if [[ "${{matrix.sphinx-version}}" < "4.0" ]]; then
+              python -m pip install "jinja2<3.1"
+          fi
 
       - name: install other dependencies
         run: python -m pip install -r docs/requirements.txt