Migrate to npm and use automated release process

[frederikprijck]

Changes

To ease automated release, migrated lock to use npm instead of yarn and implemented our automated release process.
This is also more consistent with our other JS SDKs.

I compared the distributed lock.js file before and after this change, and they are identical.

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ea1c9fc) 42.19% compared to head (8d581c8) 42.19%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2508   +/-   ##
=======================================
  Coverage   42.19%   42.19%           
=======================================
  Files         120      120           
  Lines        3076     3076           
  Branches      334      334           
=======================================
  Hits         1298     1298           
  Misses       1684     1684           
  Partials       94       94           

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[frederikprijck]

Putting in draft, and see if it makes sense to make the release process work with yarn as well, as our react-native repository also uses yarn and we probably can not migrate all.

[frederikprijck]

Let's migrate to npm. We will also migrate RNA to npm.