General:
* Updated to newest MC version (12.2)
* Removed Spigot updater
* Implemented Marketplace updater
* Updated to newest TTA version
* Changed Join Update message

Marketplace:
* Moved the project over to Marketplace
* Future updates will not be released anymore on Spigot
* Support will only take place on Marketplace

* Link: http://herbystar.eu/resources/ultimate-playertoggle.17/

Maven:
* Rebuild to Maven Project
=> Enable possibility of snapshots for MC 1.13

Internal:
* Changed default sounds to new 1.12 types ( https://hub.spigotmc.org/javadocs/spigot/org/bukkit/Sound.html)
* Updated code / removed deprecated methods partly
* Error fixing across multiple MC versions