title: known class method for React Native OneSignal
body: <p>I am trying set up One Signal for Push Notification on React Native.
  But when I build in I receive <code>No known class method for selector 'didReceiveRemoteNotification:'</code> error.</p>
  
  <pre><code>#import "AppDelegate.h"
  #import &lt;React/RCTBundleURLProvider.h&gt;
  #import &lt;React/RCTRootView.h&gt;
  #import "RCTOneSignal.h"
  
  @implementation AppDelegate
  @synthesize oneSignal = _oneSignal;
  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  {
    NSURL *jsCodeLocation;
  
    self.oneSignal = [[RCTOneSignal alloc] initWithLaunchOptions:launchOptions
                                                           appId:@"xxxxxxxxx"];
  
  
  }
  
  // Required for the notification event.
  - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)notification {
    [RCTOneSignal didReceiveRemoteNotification:notification];
  }
  @end
  </code></pre>