Add support to RN 0.40

.travis.yml

 language: node_js
 node_js:
-  - "6"
+  - "7"

RNNotifications/RNNotifications.h

 @import UIKit;
 
+#ifdef __has_include(<React/RCTBridgeModule.h>)
+#import <React/RCTBridgeModule.h>
+#else
 #import "RCTBridgeModule.h"
+#endif
 #import <PushKit/PushKit.h>
 
 @interface RNNotifications : NSObject <RCTBridgeModule>

RNNotifications/RNNotifications.m

 
 #import <UIKit/UIKit.h>
 #import <PushKit/PushKit.h>
-#import "RCTBridge.h"
-#import "RCTEventDispatcher.h"
+#if __has_include(<React/RCTBridge.h>)
+#import <React/RCTBridge.h>
+#import <React/RCTEventDispatcher.h>
 #import "RNNotifications.h"
-#import "RCTConvert.h"
-#import "RCTUtils.h"
+#import <React/RCTConvert.h>
+#import <React/RCTUtils.h>
+#else
+  #import "RCTBridge.h"
+  #import "RCTEventDispatcher.h"
+  #import "RNNotifications.h"
+  #import "RCTConvert.h"
+  #import "RCTUtils.h"
+#endif
 #import "RNNotificationsBridgeQueue.h"
 
 NSString* const RNNotificationCreateAction = @"CREATE";