added angular as dependencie

[piu130]

What issue is this PR resolving? Alternatively, please describe the bugfix/enhancement this PR aims to provide To use npm instead of bower we need angular in the dependencies to use something similar to npms main-bower-files module (e.g. a new module named main-npm-files).

Have you provided unit tests that either prove the bugfix or cover the enhancement? No need Related issues No

[faceleg]

Is this required to use this module with something like webpack?