chore: bump version to 2.4.0

Merge pull request python-gitlab#1115 from python-gitlab/fix/keyset-p…

…agination-revert

Fix/keyset pagination revert

Merge pull request python-gitlab#1112 from python-gitlab/fix/rst-rend…

…erer

chore: correctly render rst

chore: bump to 2.2.0

chore: bump version to 2.1.2