Replace deprecated save actions plugin with XDEV fork

Author: AB-xdev

CONTRIBUTING.md

@@ -26,7 +26,7 @@ You should have the following things installed:
 ### Recommended setup
 * Install ``IntelliJ`` (Community Edition is sufficient)
   * Install the following plugins:
-    * [Save Actions](https://plugins.jetbrains.com/plugin/7642-save-actions) - Provides save actions, like running the formatter or adding ``final`` to fields
+    * [Save Actions](https://plugins.jetbrains.com/plugin/22113) - Provides save actions, like running the formatter or adding ``final`` to fields
     * [SonarLint](https://plugins.jetbrains.com/plugin/7973-sonarlint) - CodeStyle/CodeAnalysis
     * [Checkstyle-IDEA](https://plugins.jetbrains.com/plugin/1065-checkstyle-idea) - CodeStyle/CodeAnalysis
   * Import the project
@@ -42,4 +42,4 @@ Before releasing:
 If the ``develop`` is ready for release, create a pull request to the ``master``-Branch and merge the changes.
 
 When the release is finished do the following:
-* Merge the auto-generated PR (with the incremented version number) back into the ``develop``
+* Merge the auto-generated PR (with the incremented version number) back into the ``develop``