Test docutils 0.18.1 (#402)

Author: jarrodmillman

.github/workflows/test.yml

@@ -126,7 +126,6 @@ jobs:
         run: |
           python -m pip install --upgrade pip wheel setuptools
           python -m pip install --pre -r requirements/test.txt -r doc/requirements.txt
-          python -m pip install docutils==0.17.1  # FIXME
           python -m pip install codecov
           python -m pip list