Merge pull request libgit2#5330 from pks-t/ethomson/v0.28.4

Security release v0.28.4

Merge pull request libgit2#5329 from pks-t/ethomson/v0.27.10

Security release v0.27.10

Release v0.27.9

Release v0.28.3

Merge pull request libgit2#5064 from pks-t/pks/v0.28.2

Release v0.28.2

Merge pull request libgit2#4983 from libgit2/ethomson/v0_28_1

Release v0.28.1

Merge pull request libgit2#4970 from libgit2/ethomson/0_28

v0.28 rc1

Merge pull request libgit2#4970 from libgit2/ethomson/0_28

v0.28 rc1

CHANGELOG: there's changes (plural) not just one

Merge pull request libgit2#4846 from pks-t/pks/v0.27.6

Bugix release v0.27.7