CI | Publish to Crates.io

[EstebanBorai]

Based on https://github.com/erikjara/rut-lib/projects/3#card-31422108 .

I've added a "first step" for CI/CD with GitHub Actions through a workflow that:

1. Builds the crate for every target (linux, macos and windows)
2. Stores each artifact for future download from Actions Artifacts
3. Creates GitHub Release
4. Publish the release to Crates.io

Further Steps to get this working

• [x] Create a GitHub Secret with the key CRATES_IO_TOKEN to supply a token for cargo login
• [x] Define a event to trigger this action
• [ ] Define a body for your release

Suggestions

I would also setup a CI workflow to format, lint and test your crate before releasing!

Hope this helps!

[EstebanBorai]

Hey @erikjara any news on this PR?

[erikjara]

@EstebanBorai Hi! Let me fix those warnings, create the coverage config and I'll merge your changes :)

$ cargo clippy -- -D warnings
    Updating crates.io index
    Checking rut-lib v0.1.2 (/home/travis/build/erikjara/rut-lib)
error: called `.nth(0)` on a `std::iter::Iterator`, when `.next()` is equivalent
   --> src/lib.rs:299:22
    |
299 |             let dv = captures["dv"].to_uppercase().chars().nth(0).unwrap();
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try calling `.next()` instead of `.nth(0)`: `captures["dv"].to_uppercase().chars().next()`
    |
    = note: `-D clippy::iter-nth-zero` implied by `-D warnings`
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth_zero
error: called `.nth(0)` on a `std::iter::Iterator`, when `.next()` is equivalent
   --> src/lib.rs:313:18
    |
313 |             _ => format!("{}", dv).chars().nth(0).unwrap(),
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try calling `.next()` instead of `.nth(0)`: `format!("{}", dv).chars().next()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth_zero
error: aborting due to 2 previous errors
error: could not compile `rut-lib`.