Update event firing.

Closes #5

README.md

@@ -120,6 +120,14 @@ cordova.plugins.backgroundMode.wakeUp();
 cordova.plugins.backgroundMode.unlock();
 ```
 
+### Request to disable battery optimizations
+Starting in Android 8, apps can be put to sleep to conserve battery. When this happens (usually after 5 minutes or so), the background task is killed. This will cause things like MQTT connections to break.
+This method will show a permission prompt for the user (only if the app hasn't been granted permission) to ignore the optimization.
+
+```js
+cordova.plugins.backgroundMode.disableWebViewOptimizations();
+```
+
 ### Notification
 To indicate that the app is executing tasks in background and being paused would disrupt the user, the plug-in has to create a notification while in background - like a download progress bar.
 

src/ios/APPBackgroundMode.m

@@ -222,7 +222,7 @@ NSString* const kAPPBackgroundEventDeactivate = @"deactivate";
     NSString* flag = [NSString stringWithFormat:@"%@._isActive=%@;",
                       kAPPBackgroundJsNamespace, active];
 
-    NSString* depFn = [NSString stringWithFormat:@"%@.on%@();",
+    NSString* depFn = [NSString stringWithFormat:@"%@.on('%@');",
                        kAPPBackgroundJsNamespace, event];
 
     NSString* fn = [NSString stringWithFormat:@"%@.fireEvent('%@');",