Incompatible with 516

[flleeppyy]

Describe the bug
FastDMM2 does not work with 516 codebases

Error: (code/_compile_options.dm:68:8) Your version of BYOND is too out-of-date to compile this project. Go to https://secure.byond.com/download and update.

What browser are you using?

Firefox Developer Edition 138.0b9 (64-bit)

Additional context

Loading Monkeris which is a 516 codebase