Add Angular 2+ Frontend Development skill

[ifrntnd]

Is your feature request related to a problem? Please describe.
N/A

Describe the solution you'd like
Add Angular 2+ as a selectable skill Frontend Development

Describe alternatives you've considered
N/A

Additional context

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[aravindvnair99]

Duplicate of #371 @frntnd93

[ifrntnd]

Duplicate of #371 @frntnd93

This PR add new Angular 2+ skill and has nothing to do with #371, which talks about AngularJs link issue redirects to angular.io and not to angularjs.org. My PR related to fix #371

[aravindvnair99]

Duplicate of #371 @frntnd93

This PR add new Angular 2+ skill and has nothing to do with #371, which talks about AngularJs link issue redirects to angular.io and not to angularjs.org. My PR related to fix #371

@frntnd93 I meant, there could be one issue and PR for fixing the entire Angular-AngularJS mess. But yes, works either way. 👍