ci: add github-actions ci lint, coverage and nightly

[panva]

Adds Github Actions CI with the following jobs

• lint
• test matrix on all actions-available platforms + minimal and current node versions
• test on nightly

example run

[cclauss]

Nice!

[tniessen]

Do we have any rules or guidelines regarding GitHub actions @nodejs/tsc?

[Trott]

Do we have any rules or guidelines regarding GitHub actions @nodejs/tsc?

I think @nodejs/build may be experimenting with them in places? AFAIK, there are no guidelines or rules. This seems OK to me, but perhaps superfluous because you already have Travis? Although maybe it does stuff Travis doesn't.

Anyway, I defer to others on this, but I don't have a problem with it.

[cclauss]

My sense is that GitHub Actions is more modern than Travis CI in many ways and more pleasant to work with but it remains in Beta until November so there is still quirkiness.

[rvagg]

no guidelines and not much experimentation (if any?) in the org. I'd encourage experimentation like this because it's bound to become standard over time in the org and the sooner we figure out best practices the better. +1

[cclauss]

Other Actions experiments:

• build: test Python 3 using GitHub Actions-based CI node#29474 (open)
• build: try GitHub Actions CI for running tests node#29193 (closed)
• Add GitHub Action: Python Syntax Checker node-gyp#1671 (closed)

[rvagg]

Very sorry @cclauss, thanks for the correction

[ryzokuken]

Thanks!

[tniessen]

Sorry @panva, I forgot about this. Would you mind updating the minimum Node.js version to match package.json so I can land this?

[panva]

@tniessen done, it'll take a merge to master to see the action run tho.