GitHub Actions fixes, Python versions supported & OS's tested on

Also
* Drop coveralls

.github/workflows/ci.yml

@@ -6,32 +6,19 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        # Need to use an older Ubuntu so Python 3.6 is available
-        os: [macos-latest, windows-latest, ubuntu-20.04]
-        python-version: [ '3.6', '3.7', '3.8', '3.9', '3.10']
+        os: ubuntu-latest
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13']
         myst-parser-version: [ '<0.18.0', '>=0.18.0' ]
-        exclude:
-          # myst-parser 0.18.0 dropped support for Python 3.6
-          - python-version: '3.6'
-            myst-parser-version: '>=0.18.0'
-          # GitHub Actions dropped support for Python 3.6 on macos and windows
-          - os: macos-latest
-            python-version: '3.6'
-          - os: windows-latest
-            python-version: '3.6'
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
       - run: pip install .[test]
       - run: pip install "myst-parser${{ matrix.myst-parser-version }}"
       # Run pytest
-      - run: pytest -vv --cov sphinxcontrib
+      - run: pytest -vv sphinxcontrib
       # Also try building the docs in the docs directory
       - run: pip install sphinx_rtd_theme
       - run: cd docs && make dirhtml
-      - env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: coveralls --service=github

.github/workflows/lint.yml

@@ -3,14 +3,13 @@ on: [push, pull_request]
 
 jobs:
   lint:
-    # Need to use an older Ubuntu so Python 3.6 is available
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Setup python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.6
+        python-version: 3.9
         architecture: x64
         cache: pip
     - run: pip install .[test]

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Changed
+
+- Dropped support for Python 3.8 and lower, as these are end of life
+- Only test on Linux, as standard for Open Data Services libraries
+
 ## [0.5.0] - 2022-09-26
 
 ### Changed

setup.py

@@ -7,6 +7,7 @@
     author_email='[email protected]',
     packages=['sphinxcontrib'],
     url='https://github.com/OpenDataServices/sphinxcontrib-opendataservices',
+    python_requires=">=3.9.0",
     install_requires=[
         'docutils',
         'jsonpointer',