feat: run initial test using jest findRelatedTests

[Djaler]

Resolves #1655

[Djaler]

@nicojs there are one failed e2e case jest-mutate-outside-roots. Looks like findRelatedTests doesn't find test when source file is outside roots. How we should handle this case?

[nicojs]

Hi Djaler, you can see the workaround we used for mutantRun:

 ​    ​if​ ​(​fileNameUnderTest​ ​&&​ ​this​.​jestConfig​.​roots​)​ ​{ 
 ​      ​// Make sure the file under test lives inside one of the roots

(Line 156)

That should work.

PR looks good as far as I can see on my phone 📱. Will take a closer look when build is green.

[Djaler]

@nicojs done

[nicojs]

Thx, I'll take a look next Monday

[nicojs]

Took me a full week longer, but here it is 😅

This will be released with the next minor release, hopefully in a few days.