GH-832: Look at devDeps for restoring platforms

[dpogue]

Platforms affected

N/A

Motivation and Context

Closes #832 where the cordova prepare restore process would not look at package.json devDependencies for platforms, and would restore platforms with the wrong versions.

Description

Make the platform restore process match the plugin restore process where both devDependencies and dependencies are taken into account.

This also includes fixes for writing package.json with the correct newlines, which should address the complaints raised in https://github.com/apache/cordova-cli/issues/353 and possibly https://github.com/apache/cordova-lib/issues/694.

It also changes the handling of promises when restoring platforms/plugins such that a failure to restore will return a rejecting promise rather than swallowing the error and continuing to build.

Testing

Unit tests pass

Checklist

• [x] I've run the tests to see all new and existing tests pass
• [x] I added automated test coverage as appropriate for this change
• [x] If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)

[codecov-commenter]

Codecov Report

Merging #835 into master will decrease coverage by 0.07%. The diff coverage is 91.30%.

@@            Coverage Diff             @@
##           master     #835      +/-   ##
==========================================
- Coverage   89.96%   89.89%   -0.08%     
==========================================
  Files          46       46              
  Lines        2133     2097      -36     
==========================================
- Hits         1919     1885      -34     
+ Misses        214      212       -2     

Impacted Files	Coverage Δ
src/util/promise-util.js	100.00% <ø> (+16.66%)	:arrow_up:
src/cordova/restore-util.js	92.50% <91.30%> (-1.46%)	:arrow_down:

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