Release v2.2.2

• f172dbd Merge branch 'master' of github.com:bokysan/docker-postfix into master
• b85c1ea Update: Upgrade OAuth library to v0.10
• cc6c8e4 Fix readability check for OpenDKIM keys (#49)
• a956398 Replace localhost with 127.0.0.1 for healthcheck (#50)
• 9f66388 Temporary disable XOAuth integration tests (again).
• cc779fb Fix actions
• 1aa1de5 Fix actions
• 2e79009 Try to re-enable XOAuth2 integration tests
• c1985b1 Badges galore!
• 8e240d8 Add Docker stars and pulls to README.md