gradle.yml - update some stuff

request-a-feature.yml - add version stuff

Prepare for release of 1.2.0

Merge pull request #4 from ShaneBeee/dev/update

build.gradle - add java 11 support

MessageFilter - filter out Skript's alias errors for modded items

SkriptRegistrations - cut alias count in half since we register 2 names per item

data - add debug messages when registering modded objects

Util - add debug option

ModEntityType - sort Supplier

ModEntityType - update docs for changes

ItemTypes - add option without special chars

ModEntityType - add support for spaces in keys (instead of colons/slash/underscore)

SkriptRegistrations - small cleanup for alias registration

Prepare for release of 1.1.0