[FEATURE] Java 11 support

[Mike5357]

I have checked that...

• ...such a feature does not exist already
• ...such a feature request has not been submitted already

Description

Currently HMCCosmetics is compiled with Java 16, and will not load on Java 11.
java.lang.UnsupportedClassVersionError: io/github/fisher2911/hmccosmetics/HMCCosmetics has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 55.0

Now- before just telling me to update Java, I would if I could! However I am running a Hybrid 1.16.5 server (Arclight) with the core mod we use (Pixelmon) only supporting up to Java 11, which means that at this time I cannot use the plugin :(

Config Changes

No response

[Toinetoine1]

You can clone the project and recompile it using Java 11

[Mike5357]

You can clone the project and recompile it using Java 11

I tried to do so, but there are many functions (namely switch/case expressions) that are Java 13+ currently. Those were easy to convert myself, but then I ran into modelengine and packetevents loading errors, and its now beyond my level of understanding to fix myself lol

[Fisher2911]

I would try asking the developer of the mod to update their Java version, it is easier to update Java than to downgrade it.