Plugin validation issues

[vatbub]

Hi there,
thank you again for creating this great plugin :)

I recently ran Maven Plugin Validation on my projects, and it warned me about multiple validation issues. This is the message that I got:

[WARNING]  * com.rudikershaw.gitbuildhook:git-build-hook-maven-plugin:3.4.1
[WARNING]   Plugin EXTERNAL issue(s):
[WARNING]    * Plugin is a Maven 2.x plugin, which will be not supported in Maven 4.x
[WARNING]    * Plugin mixes multiple Maven versions: [3.9.0, 2.2.1]

Maven setup:

Apache Maven 3.9.3 (21122926829f1ead511c958d89bd2f672198ae9f)
Maven home: C:\apache-maven-3.8.6-bin\apache-maven-3.8.6
Java version: 19.0.2, vendor: Eclipse Adoptium, runtime: C:\Program Files\Eclipse Adoptium\jdk-19.0.2.7-hotspot
Default locale: de_DE, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

To run the plugin validation yourself, you need a project that uses your plugin and then run mvn -Dmaven.plugin.validation=verbose package which will run a build and show all plugin validation errors at the end.

This is more of a warning rather than an actual error, so fixing it has a rather low priority, but I wanted to let you know nevertheless.

Cheers :)