Custom cape fix for b84

[Pelusita]

Re: Custom Cape Module

So I make the steps in this post but I have an error, this one:

[mems]

I assume the CustomCape module is an Object type. If it is then simply replace the customCape variable with this:

CustomCape customCape = CustomCape.INSTANCE;

[Pelusita]

@mems Should I make the CustomCape module in Java or Kotlin?

[mems]

The modules should preferably be in Kotlin.