dispose method
void
dispose()
Implementation
void dispose(){
_valuesStart.clear();
_valuesEnd.clear();
_valuesStartRepeat.clear();
_chainedTweens.clear();
_onStartCallback = null;
_onEveryStartCallback = null;
_onUpdateCallback = null;
_onRepeatCallback = null;
_onCompleteCallback = null;
_onStopCallback = null;
}