Features/v5/move swap fixes + some other important commits (comments, etc) (#2699)

* Use generics instead of the raw class

* Add Gradle wrapper verification

* Fix biome setting in versions prior to 1.15

* Fixes #2654

* Document area getters in PlotAreaManager, and replace y-value with z in the area contains check.

* Remove update notifications

* Remove unused dependencies

* Do not kick plot owners on "/p deny *"

* Do not kick any added players on /p deny *

* Allow redstone to be used in server plot with `redstone.disable-offline` enabled.

Potentially fixes #2613

* Disallow swapping ,erged plots

* Fix legacy converter.

* Fix blockbucket pattern generation

* Prevent pasting schematics onto merged plots.

* Cancel claim event correctly

* Revert "Cancel claim event correctly"

This reverts commit 0f786155
Further investigation required

* Fix plot swapping messing up owners. Fixes #2282

* Fix plot move

* Prevent plot swapping form changing the database unless the swap was successful.

* Update signs after swap.

* Only send move success message if the move was successful.

Co-authored-by: Matt <4009945+MattBDev@users.noreply.github.com>
Co-authored-by: NotMyFault <mc.cache@web.de>
Co-authored-by: Daniel <admin@hywse.eu>
Co-authored-by: Hannes Greule <SirYwell@users.noreply.github.com>

.github/workflows/gradle.yml

@@ -22,5 +22,7 @@ jobs:
       uses: actions/setup-java@v1
       with:
         java-version: 1.8
+    - name: Gradle Wrapper Validation
+      uses: gradle/wrapper-validation-action@v1
     - name: Test with Gradle
       run: ./gradlew clean build