Update CHANGELOG.md for existing versions up to 2.1.0

[KalleOlaviNiemitalo]

Update CHANGELOG.md so it describes all existing versions from 1.0 to 2.1.0. Add a link from README.md to CHANGELOG.md.

Preferably, the release notes should be in GitHub releases like https://github.com/jenkinsci/sidebar-link-plugin/releases/tag/sidebar-link-2.1.0 so that https://plugins.jenkins.io/sidebar-link/#releases would display them. I cannot make a pull request to those, though.

Related to #21, which suggests using Release Drafter. I have no experience with that.

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue
  • Doesn't seem necessary because this PR affects documentation only.

[KalleOlaviNiemitalo]

Some earlier versions are missing as well.

[jonesbusy]

@KalleOlaviNiemitalo If you need help with CD release and release draft I can help with that (I used it few days ago with some plugin I maintain : https://github.com/jenkinsci/openshift-k8s-credentials-plugin)

But basically you can follow this guide to adapt the maven config for incrementals and template of workflow files : https://www.jenkins.io/doc/developer/publishing/releasing-cd/

Regards

[KalleOlaviNiemitalo]

In any case, I think I should populate CHANGELOG.md for the existing releases. If Release Drafter is later deployed, those entries can then be copied to the releases on GitHub, whether this PR is merged or not.

[damianszczepanik]

I'm happy to accept this but now this is in review state. Is it by purpose?

[KalleOlaviNiemitalo]

Yes, I'd like to first add information about some older versions that are not currently listed.

[KalleOlaviNiemitalo]

Also, the date formats are inconsistent.

[KalleOlaviNiemitalo]

The element in pom.xml is actually hpi.compatibleSinceVersion.

sidebar-link-plugin/pom.xml

Line 19 in 45a4157

<hpi.compatibleSinceVersion>2.0.0</hpi.compatibleSinceVersion>

[damianszczepanik]

Great job - thank you!

[KalleOlaviNiemitalo]

The README change has now propagated to https://plugins.jenkins.io/sidebar-link/#documentation.