Fiu VM & Deserializer Fixes

[SnorlaxAssist]

Fixes #16 Fixes #14

• Fixes VARARG being short in table list
• Fixes MULTRET SETLIST Short List
• Fixes wrong referenced prototype in NEWCLOSURE

[SnorlaxAssist]

New changes:

• Fixes JUMPXEQKB.
• Fixes for loops with metatables using __call.
• Fixes numbered for loops with nan limit values.
• Fixes NEWCLOSURE.
• Fixes upvalues.
• Fixes Luau deserializations.
• Fixes SUBRK & DIVRK. (for Luau 0.613+)
• Only supports Luau 0.613+ bytecodes.

[green-real]

Looking good

[SnorlaxAssist]

LGTM!

Edit: made a change just now, not much but just code reduction