Removed onScrollAnimationEnd

* Compatibility with react-native@0.48.4
* Fixed #5

Author: cesardeazevedo

android/src/main/java/com/rnnestedscrollview/ReactNestedScrollViewManager.java

@@ -224,7 +224,6 @@ public static Map createExportedCustomDirectEventTypeConstants() {
         .put(ScrollEventType.SCROLL.getJSEventName(), MapBuilder.of("registrationName", "onScroll"))
         .put(ScrollEventType.BEGIN_DRAG.getJSEventName(), MapBuilder.of("registrationName", "onScrollBeginDrag"))
         .put(ScrollEventType.END_DRAG.getJSEventName(), MapBuilder.of("registrationName", "onScrollEndDrag"))
-        .put(ScrollEventType.ANIMATION_END.getJSEventName(), MapBuilder.of("registrationName", "onScrollAnimationEnd"))
         .put(ScrollEventType.MOMENTUM_BEGIN.getJSEventName(), MapBuilder.of("registrationName", "onMomentumScrollBegin"))
         .put(ScrollEventType.MOMENTUM_END.getJSEventName(), MapBuilder.of("registrationName", "onMomentumScrollEnd"))
         .build();

lib/NestedScrollView.js

@@ -245,11 +245,6 @@ const ScrollView = createReactClass({
      * events can be controlled using the `scrollEventThrottle` prop.
      */
     onScroll: PropTypes.func,
-    /**
-     * Called when a scrolling animation ends.
-     * @platform ios
-     */
-    onScrollAnimationEnd: PropTypes.func,
     /**
      * Called when scrollable content view of the ScrollView changes.
      *