Git Client Plugin 3.1.0

🚀 New features and improvements

• JENKINS-45228 - Add authentication to git merge operations (#488) @gjabouley-invn

🐛 Bug Fixes

• JENKINS-60316 - Fix escaping single quotes in Unix file paths (#486) @darxriggs

📦 Dependency updates

• Use JGit 5.6.0 (#482) @darxriggs
• Use parent pom 3.55 (#487) @MarkEWaite
• Bump incrementals version (#494) @timja

📝 Documentation updates

• Rename "slave" to "agent" (#474) @darxriggs
• Convert README to adoc, add CHANGELOG & Priorities (#477) @MarkEWaite
• Update dependencies and docs for git client 3.1 release (#483) @MarkEWaite
• Add docs badge for new gitter channel (#491) @MarkEWaite

🚦 Tests

• JENKINS-60694 - Fix InjectedTest failures from JTH 2.57 (#492) @MarkEWaite
• Replace deprecated Mockito method "verifyZeroInteractions" (#485) @darxriggs
• Fix failing stable-2.x tests (#479) @MarkEWaite
• Switch from README.md to README.adoc in tests (#478) @MarkEWaite
• Upgrade to use jcasc test harness (#490) @timja