textproc/py-docutils: revert update to 0.18 (unbreak devel/cmake)
- this breaks devel/cmake
[ 39%] Building CXX object Source/CMakeFiles/CMakeLib.dir/cmPropertyDefinition.cxx.o
- Utilities/Sphinx/doc_format_man ---
- [Utilities/Sphinx/doc_format_man] Error code 1
make[3]: stopped in /wrkdirs/usr/ports/devel/cmake/work/cmake-3.21.4
1 error
This reverts commit dc8aa7c1129a911155ec93a2dd61fc1591c197b7.