Replace async for-of loops with promises / clean up CI

[gomorizsolt]

Issue #5.

Changes:

• replace the async-await structure with promises
• replace for-of loops
• clean up CI logs

[thisismydesign]

[@octokit/rest] `const Octokit = require("@octokit/rest")` is deprecated. Use `const { Octokit } = require("@octokit/rest")` instead

Since it's not a direct dependency of the project I don't think there's anything to do with it(it's a sub-dependency of @actions/github). Does the error have something to do with actions/toolkit#334?

Update: AFAICU actions/toolkit#332 fixes the warning.

We can address this in #4

[thisismydesign]

make sure execution finishes (i.e. wait for promises to resolve), be mindful of properly returning promises and waiting for them

I don't think this was addressed. What guarantees that the async calls in the loop execute? AFAICT you'll need to collect promises and use Promise.all to wait for all of them to complete.

Also, return has no effect within forEach. Returning something from run doesn't make sense either imo, afaict nothing is using that.

[thisismydesign]

Overall looks a lot cleaner than my original version and this is what I had in mind 👍 Leaving a few comments

[thisismydesign]

Marking a few things i didn't get. Let's discuss these on the phone.

[thisismydesign]

Awesome, thanks!