Migrate to GitHub Actions 🤖

[p4checo]

Checklist

• I've rebased my changes on top of master
• I've built and run the project to see all new and existing tests pass
• I've followed the Mindera swift style guide
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.

Motivation and Context

At long last, the time as come to say goodbye to Travis CI 👋.

All hail the new king, GitHub Actions 🙌

Description

• Setup GitHub Action workflows:

  • ci.yml (Build + Test)
  • pod-lint (CocoaPods Lint)
  • release.yml (GitHub and CocoaPods releases)
  • spm.yml (SwiftPM Build)

• Remove .travis.yml.

• Add Gemfile and Gemfile.lock.

[codecov]

Codecov Report

Merging #233 (2cb9d7c) into master (1221eca) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #233   +/-   ##
=======================================
  Coverage   94.99%   94.99%           
=======================================
  Files          97       97           
  Lines        3296     3296           
=======================================
  Hits         3131     3131           
  Misses        165      165           

---

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[pakerwreah]

Great job! 💪🏻
I wonder how you're testing this, because there's a lot of stuff in there.
I would need like 100 commits on a draft PR to get this working.

[diogoeiras]

✨🤖

[p4checo]

@pakerwreah haha

I'm testing it in this PR, actually. Not 100 commits but at least 10 I've made already (via force pushes, so no one sees my mess) 😇

I can't also take full credit, because I had the luck to get some inspiration elsewhere and simply adapted to our case 🤫

[p4checo]

Well, it appears that workflows that depend on other workflows (like release.yml) are only ran once they are present in master/main (I've done that experiment on a different repo, to avoid more push spam).

So, I think that we have to merge this and then test to see if the Release workflow is working as expected 🍀🙏🏼 🕯️

Additionally, there's something not working with the codecov github action (codecov/codecov-action@v1), but the remote script works. Will give it another go with v1.5 (latest) and if that doesn't work I'll leave the script and move on