[add] 'View' support for 'backgroundBlendMode' CSS

Fix #476

docs/components/View.md

@@ -158,6 +158,7 @@ Controls whether the View can be the target of touch events. The enhanced
 + `animationTimingFunction` ‡
 + `backfaceVisibility`
 + `backgroundAttachment` ‡
++ `backgroundBlendMode` ‡
 + `backgroundClip` ‡
 + `backgroundColor`
 + `backgroundImage` ‡

src/components/ScrollView/ScrollViewBase.js

@@ -141,7 +141,7 @@ export default class ScrollViewBase extends Component {
     }
   }
 
-  _setNodeRef = (element:View) => {
+  _setNodeRef = (element: View) => {
     this._node = findNodeHandle(element);
   };
 

src/components/View/ViewStylePropTypes.js

@@ -26,6 +26,7 @@ const ViewStylePropTypes = {
    * @platform web
    */
   backgroundAttachment: string,
+  backgroundBlendMode: string,
   backgroundClip: string,
   backgroundImage: string,
   backgroundOrigin: oneOf(['border-box', 'content-box', 'padding-box']),