Using wasm version of compiler for npm package and REMIX

[athei]

As of right now REMIX and our npm compiler package use a hosted compiler backend to compile Solitity. We want to get rid of the backend and instead do the compilation locally inside the browser or nodejs.

We already release a wasm version of revive but some follow up work has to be done to make it work inside the browser.

Depends on: paritytech/revive#24

[pgherveou]

Good to be close, right @smiasojed feel free to reopen if I am wrong