The player-click event is not emitted by VAST/VPAID

[edrpls]

The player-click event is emitted only when using media file sources, when using VAST with or without VPAID, the event is not emitted.

This event should be emitted regardless of the source.

[edrpls]

VPAID emits the event since #72, support for VAST without VPAID is still pending.

[edrpls]

VAST support should be added on enableVASTTracking, in the VASTTracker clickthrough callback.

[edrpls]

The VAST click payload should have the same structure as VPAID and be emitted before opening the new page.