chore: configure app rel dependencies as abs paths

[erisu]

Motivation and Context

Build fails when the package.json contains a dependency that is from the local file system and is a relative path.

Description

This PR adds to the prepare step for the App's package.json to convert relative paths to absolute paths. If the converted path does not exist, it will be drop from being added to the App's package.json and a warning is displayed.

Testing

• npm t
• platform add, prepare, and build

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-io]

Codecov Report

Merging #125 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #125   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          14     14           
  Lines         608    620   +12     
=====================================
+ Hits          608    620   +12

Impacted Files	Coverage Δ
bin/templates/cordova/lib/prepare.js	100% <100%> (ø)	⬆️
bin/templates/cordova/lib/PackageJsonParser.js	100% <100%> (ø)	⬆️

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[GedasGa]

Tested out basic functionality, everything looks good!