ci: test with Mercurial 6.2, mark it as supported
This also avoids the somewhat hacky workaround I added to the CI setup recently, by properly upgrading Pip and detecting unstable versions. Thanks to Manuel Jacob for pointing this out!
This also avoids the somewhat hacky workaround I added to the CI setup recently, by properly upgrading Pip and detecting unstable versions. Thanks to Manuel Jacob for pointing this out!