refactor(CordovaError): drop netflix/nerror dependency

[dpogue]

Platforms affected

All

Motivation and Context

The @netflix/nerror package doesn't seem to be actively maintained, and it has lodash as a dependency which is a big source of dependabot security warnings.

Description

Implement our own CordovaError mimicking the (few) relevant parts of VError.

There are technically a few breaking changes here, to be discussed whether this needs to wait for a major or not:

• I changed the err.cause() method to an err.cause getter
  • This was used in 1 spot in the tests
• I changed the err.info() method to an err.info getter (unused)
• I did not implement the err.assignInfo(...) method (unused)
• Several class-level methods are not implemented because they were not used:
  • assignInfo
  • findCauseByName
  • hasCauseWithName
  • errorFromList
  • errorForEach
  • isVError

Testing

Existing tests pass and added test cases to ensure proper code coverage.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.49%. Comparing base (86a9779) to head (0314e5b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
+ Coverage   95.40%   95.49%   +0.09%     
==========================================
  Files          20       20              
  Lines        3917     3953      +36     
==========================================
+ Hits         3737     3775      +38     
+ Misses        180      178       -2     

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[erisu]

Code changes LGTM.
Tests passed with minimum supported Node version.

As there are breaking changes, I would suggest including this with next major release.

While these breaking changes won’t affect Cordova (since that functionality wasn't used), others who use this package directly might be affected (depending on how they use it).