[Jenkins Development Support for IntelliJ IDEA] Release 2.1.0

[Denys Digtiar]

A new release of the IntelliJ plugin has been approved recently.

2.1.0 is a Hacktoberfest release that publishes contributions from @jgreffe, @julieheard, and @NotMyFault

Summary of functional changes:

* Jelly Views are now displayed in the Class' Structure tool window. You can see at a glance what views the given class has and quickly navigate to them.

* For better or for worse :) IntelliJ now recognizes jelly as a separate XML-based language with a separate file type and unique icon. 

    - If you notice any regression, please report it.

* A new "Jenkins Jelly View" file template is available out of the box. 

    - If you have existing templates you think are worth adding to the plugin. It is relatively easy to contribute. Please see Providing File and Code Templates

Notable non-functional changes:

* No more "IllegalArgumentException: Invalid range specified: (1, -1)" when editing style attribute

* Gradle Wrapper is updated and configured to verify the plugin against all the newer IntelliJ releases automatically (used to be only verified against a hard-coded list of versions).

* Plugin is fully compatible with 2020.3.4 to 2022.3 EAP. All the remaining usages of deprecated APIs were removed.

Full Release Drafter-generated release notes are at https://github.com/jenkinsci/idea-stapler-plugin/releases/tag/2.1.0