Release 9.0.0

[TheSnoozer]

Describe the release details (required)

This is the place holder to release the new 9.0.0 version.
Note that the current open tickets should be addressed, before performing a release.

General scope of the new release:

Fixed some minor things, added some minor features...(full list https://github.com/git-commit-id/git-commit-id-maven-plugin/issues?q=milestone%3A9.0.0).

Release-Guide

see http://central.sonatype.org/pages/ossrh-guide.html

• run an actual test with a local installed plugin (using https://github.com/git-commit-id/git-commit-id-maven-debugging)

• ensure the local maven version is 3.9.0 and newer to avoid MNG-7055

• verify that ~/.m2/settings.xml exists and contains username/password which is required as per https://central.sonatype.org/publish/publish-maven/#distribution-management-and-authentication

• mvn release:prepare
  [INFO] Checking dependencies and plugins for snapshots ...
  What is the release version for "Git Commit Id Maven Plugin"? (io.github.git-commit-id:git-commit-id-maven-plugin) 8.0.1: : 9.0.0 [ENTER]
  What is SCM release tag or label for "Git Commit Id Maven Plugin"? (io.github.git-commit-id:git-commit-id-maven-plugin) git-commit-id-maven-plugin-8.0.0: : v9.0.0 [ENTER]
  What is the new development version for "Git Commit Id Maven Plugin"? (io.github.git-commit-id:git-commit-id-maven-plugin) 9.0.1-SNAPSHOT: : [ENTER]

• wait for github actions to pass

• mvn release:perform
  - (or mvn clean source:jar javadoc:jar deploy -Pgpg from the git tag)
  - (or mvn release:perform -Dresume=false)
  - Note: If the uploading of the artifacts fails, ensure that a settings.xml exists under the local .m2-Folder

• then go to https://s01.oss.sonatype.org/ log in there and go to the staging repositories, there will be the plugin, you have to first close and then release it if validation passed.

• verify plugin is available on (might take some time) https://repo1.maven.org/maven2/io/github/git-commit-id/git-commit-id-maven-plugin/

• under Milestones close old milestone

• under Milestones create new milestone for new version

• under Releases publish Release-Notes

• update readme to point to the latest version available

• run performance comparison with previous release (https://gist.github.com/TheSnoozer/7891eb9412c9584a052f00650d9c516b)