Add YML support.

[vikasgarghb]

https://github.com/ajwhite/gulp-ng-config/issues/19 @ajwhite Mind taking a look at this?

[atticoos]

Nice work here! All around this looks pretty good!

One thing I wanted to achieve in this implementation is inferring the parser by the file extension as well as what you've provided with the additional configuration option. I think the following would be an ideal solution:

• If parser is passed in by the configuration, use the requested parser (yml vs json) -- which is what you've done in this PR
• If no configuration is provided, but file ends in .yml, use yml parser, otherwise default to JSON
• Otherwise, always fallback to JSON

---

And lastly my nitpick would be to change the configuration key from configType to parser, so we would be using:

gulpNgConfig('module', {
  parser: 'yml'
});

[vikasgarghb]

Thanks for taking a look, will make the required changes.

[vikasgarghb]

@ajwhite Pushed the requested changes.

[vikasgarghb]

@ajwhite Made the requested changes.

[atticoos]

Nice work :) I'll notify you via this thread when the release goes out.

LGTM :+1: