Port bash scripts to JS

[saschanaz]

Bit longer but better portability.

Closes #546

[foolip]

I've opened #549 to run CI on macOS and Windows as well.

[saschanaz]

Do you want me to rebase this on it?

[foolip]

Thanks for fixing this! Just one paperwork nit :)

[foolip]

@saschanaz I've landed #549 with the Windows config commented out, so that you can enable it in this PR to show that it's working.

[saschanaz]

My local unittest result on Windows:

> npm run unittest

.... skipped, just normal successful results ....

  1) "after all" hook in "{root}"

  129 passing (7s)
  1 failing

  1) "after all" hook in "{root}":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
      at listOnTimeout (internal/timers.js:554:17)
      at processTimers (internal/timers.js:497:7)



[Error: EBUSY: resource busy or locked, unlink 'C:\Users\Kagami\AppData\Local\Temp\puppeteer_dev_firefox_profile-AC0rlQ\cert9.db'] {
  errno: -4082,
  code: 'EBUSY',
  syscall: 'unlink',
  path: 'C:\\Users\\Kagami\\AppData\\Local\\Temp\\puppeteer_dev_firefox_profile-AC0rlQ\\cert9.db'
}

Then it halts forever. 🤔🤔

[saschanaz]

I guess it's a puppeteer issue: puppeteer/puppeteer#5673

[queengooborg]

Looking all good, thanks @saschanaz!