fix ios staus bar icon colors

example/ios/Runner/AppDelegate.swift

@@ -14,6 +14,10 @@ import Flutter
             sharedDefaults?.removeObject(forKey: "messageQueue")
         }
 
+        if #available(iOS 10.0, *) {
+          UNUserNotificationCenter.current().delegate = self
+        }
+
         GeneratedPluginRegistrant.register(with: self)
         return super.application(application, didFinishLaunchingWithOptions: launchOptions)
     }

example/ios/Runner/Info.plist

@@ -58,5 +58,9 @@
     <array>
         <string>remote-notification</string>
     </array>
+    <key>UIUserInterfaceStyle</key>
+    <string>Light</string>
+    <key>UIViewControllerBasedStatusBarAppearance</key>
+    <true/>
 </dict>
 </plist>