Move tests to GitHub Actions, add Windows Tests

From #124:

karlhorky: what do you think about adding Windows end-to-end tests to install-peerdeps? To catch any errors like this in the future? GitHub Actions and seemingly also Travis CI have the ability to run on Windows…

nathanleung: I think that’s a great idea — don’t want to break this package for Windows users in the future if I don’t have to.

ljharb: travis-ci is slow and dying; i’d suggest github actions. I can convert the existing tests to github actions if @nathanhleung is OK with that; windows tests can go in separately/in parallel as a separate workflow.

nathanleung: It would be awesome if you could do that, thanks!

karlhorky: Cool, if this is the way to go, maybe that could be done with a matrix - here’s our approach for Preflight: https://github.com/upleveled/preflight/blob/main/.github/workflows/build-lint-test.yml#L7-L10

cc @ljharb @nathanhleung

[ljharb]

I’ll make a PR soon that converts the tests to GH.

[karlhorky]

Great, now that https://github.com/nathanhleung/install-peerdeps/pull/139 has been merged, we just have:

1. Add Windows tests
2. Add test for eslint-config-react-app to test situations like https://github.com/facebook/create-react-app/issues/10465