Drop docutils 0.14.x/0.15.x support
In !20 (merged), we added to support docutils 0.15.x/0.16.x by adding the tests with these versions. After it, docutils 0.16-based packages will be shipped at %12.10 and later (omnibus-gitlab!4017 (merged) and gitlab-org/build/CNG!412 (merged)). Dropping docutils 0.14.x/0.15.x support should be done in the near future.
Two following options are considerable:
- With security release policy (https://docs.gitlab.com/ee/policy/maintenance.html#security-releases), we are shipping two releases. We can drop docutils 0.14.x/0.15.x support at 2020-06-22 (release date of %13.1) or later.
- As docutils version is minor, we can drop docutils 0.14.x/0.15.x support now (in %12.10).