Install wasm-gc from crates.io

[josmardias]

This PR updates setup.md to install wasm-gc from crates.io, instead of from git

[josmardias]

Already updated wasm-gc docs to install from creates.io as well
alexcrichton/wasm-gc/pull/16

[mgattozzi]

Hey @josmardias thanks for keeping track of this and updating the docs accordingly! This is great!

Would you mind also updating the docs here as well so we can keep the rust-wasm book up to date as well? Once you do that let's get this PR merged! :D

[josmardias]

Sure! Good catch!

[josmardias]

Oh wait. I'm confused.
Isn't that exactly the file I'm changing on this PR? 😕

Sorry if I'm getting it wrong

[josmardias]

Did a little search here for cargo install.
Didn't find other relevant occurrences

---

built rust-wasm book here:

Should I open a PR to gh-pages as well or CI will take care of that?

[josmardias]

I realized that I didn't explained myself properly on the PR description, so I edited it to make it try to make it clear what I'm doing on this PR.

[mgattozzi]

Oh @josmardias I thought this was the README.md file for some reason. You're right. It's been a long week to say the least 😅 This is perfect actually. You did nothing wrong here. The CI will build the book so you don't need to worry about that. Thanks again!