Merge pull request #8 from prscX/master

RN47.0 has removed `createJSModules` method

android/src/main/java/com/reactlibrary/RNThumbnailPackage.java

       return Arrays.<NativeModule>asList(new RNThumbnailModule(reactContext));
     }
 
-    @Override
     public List<Class<? extends JavaScriptModule>> createJSModules() {
       return Collections.emptyList();
     }
     public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
       return Collections.emptyList();
     }
-}
+}