changed "changeMedia" event to bind to internal "onChangeMedia" instead of "playerReady" to be compatible with the KDP
Bind to events once on init, and not every mediaReady.
call to "close" on "changeMedia" calls to fix issue with entryId not updated.
SUP-517 #time 1d
Updated version to 1.8.9.3
revert "changeMedia" kdp mappping
Merge branch 'SUP-517'