Better parallelize CI jobs

[Earlopain]

Drop appraisal while we're at it. Makes it a bit easier

[bensheldon]

💯 🥳 🥇

This is amazing!!!! THANK YOU!! You cleaned up so many problems and it's so much better now (and TIL eval_gemfile).

I'm a little surprised that there aren't more gem tweaks that are necessary because I felt like I was frequently struggling with Appraisal, so this is great!

[bensheldon]

you fixed a longstanding annoyance! 🙌🏻

[bensheldon]

I think Rails is likely to be the culprit in most matrix-related failures:

Suggested change

	name: Test - Ruby ${{ matrix.ruby }} - Postgres ${{ matrix.pg }} - ${{ matrix.gemfile }}
	name: Test - ${{ matrix.gemfile }} - Ruby ${{ matrix.ruby }} - PG ${{ matrix.pg }}

[Earlopain]

Yes, that makes sense. I'll fix that up

[bensheldon]

btw, that failure with Rails 6.1 is sorta known: #1280

It's fixed by pulling from the Rails 6.1-stable git branch, though I'm a little surprised it shows up now rather than before.

[Earlopain]

btw, that failure with Rails 6.1 is sorta known:

6.1 previously only ran with Ruby 3.0 which explains why it didn't pop up before. I could add excludes to the matrix to preserve that but just pulling 6-1-stable seems fine for CI. WDYT?

[Earlopain]

For eval_gemfile, it sorta is/isn't actually endorsed for usage by the bundler maintainers rubygems/rubygems#6292 (comment) rubygems/bundler-site#1081. It makes things so very simple though and don't believe it'll disappear (and if it does, let's just handle that then)

(I'm hugely surprised that this PR turned out well with just one try. Usually my interactions with github actions require much more force-pushes 🙃)

[bensheldon]

🫶 thank you!