Making hotpatch work with webassembly

[ValorZard]

I have no idea if this crate works already with webassembly or not, but just in case, it might be a good idea to make it work on webassembly.

[Shizcow]

Webassembly is certainly a good idea. I plan on working on this (and no_std) immediately after finishing methods. Leaving this issue open as a reminder for me to get this done.