Update github action to test more versions

Author: LecrisUT

.github/workflows/tests.yml

@@ -24,35 +24,34 @@ jobs:
 
   tests:
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.9", "3.10", "3.11"]
         # Only test the latest major release of Sphinx because otherwise we need to
         # keep multiple versions of regression tests on file and this creates lots of
         # noise in the tests.
-        sphinx: [">=6,<7"]
+        sphinx: ["~=4.0","~=5.0","~=6.0","~=7.0"]
         include:
         - os: windows-latest
-          python-version: 3.11
-          sphinx: ">=6,<7"
+          python-version: 3.x
         - os: macos-latest
-          python-version: 3.11
-          sphinx: ">=6,<7"
+          python-version: 3.x
     runs-on: ${{ matrix.os }}
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }} and Sphinx ${{ matrix.sphinx }}
+    - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
         cache: "pip"
         cache-dependency-path: "pyproject.toml"
 
-    - name: Install dependencies
+    - name: Install dependencies with Sphinx ${{ matrix.sphinx }}
       run: |
         python -m pip install --upgrade pip
-        python -m pip install -e .[test]
+        python -m pip install --upgrade "sphinx${{matrix.sphinx}}" -e .[test]
 
     - name: Run pytest
       run: >