Test with Docutils 0.20

Author: AA-Turner

.github/workflows/main.yml

@@ -31,6 +31,7 @@ jobs:
         docutils:
         - "0.18"
         - "0.19"
+        - "0.20"
 
     steps:
     - uses: actions/checkout@v3
@@ -57,13 +58,7 @@ jobs:
       env:
         PYTHONWARNINGS: ""
     - name: Install Docutils ${{ matrix.docutils }}
-      run: python -m pip install --upgrade "docutils==${{ matrix.docutils }}.*"
-      if: "!endsWith(matrix.python, '-dev')"
-      env:
-        PYTHONWARNINGS: "error,default:pkg_resources is deprecated:DeprecationWarning::,default:Deprecated call to `pkg_resources.declare_namespace:DeprecationWarning::"
-    - name: Install Docutils ${{ matrix.docutils }} (ignore warnings)
-      run: python -m pip install --upgrade "docutils==${{ matrix.docutils }}.*"
-      if: "endsWith(matrix.python, '-dev')"
+      run: python -m pip install --upgrade "docutils~=${{ matrix.docutils }}.0"
       env:
         PYTHONWARNINGS: ""
     - name: Test with pytest