Enable incrementals for easier testing and bump baseline to 2.387.3

[jonesbusy]

Incrementals is a must to test component between them

Bump baseline to 2.387.3 as all version bellow 2.361 don't receive bom update (https://github.com/jenkinsci/bom/releases/tag/2133.v2e6c00fe4d61)

Remove also unneeded dependencies when targeting Jenkins 2

Testing done

Submitter checklist

• [x] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• [x] Ensure that the pull request title represents the desired changelog entry
• [x] 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

[damianszczepanik]

@jonesbusy can you add some reference how to release properly the plugin with this incremental approach ?

[jonesbusy]

Thanks for merging.

Doesn't change the release process. Incremental only allow easier testing of component in parallel : https://www.jenkins.io/doc/developer/plugin-development/incrementals/

If you want to activate CD for automated plugin release you need more steps https://www.jenkins.io/doc/developer/publishing/releasing-cd/

[damianszczepanik]

Thanks for merging.

Doesn't change the release process. Incremental only allow easier testing of component in parallel : https://www.jenkins.io/doc/developer/plugin-development/incrementals/

If you want to activate CD for automated plugin release you need more steps https://www.jenkins.io/doc/developer/publishing/releasing-cd/

I had to made some correction to enable releasing after this change https://github.com/jenkinsci/sidebar-link-plugin/commit/e8575ed8fa2cd65e6f05ba2a36a0290d3fbc89e1