[iOS] 1024x1024 AppIcon required by Apple

ios/app/src/Images.xcassets/AppIconDebug.appiconset/Contents.json

       "scale" : "2x"
     },
     {
-      "idiom" : "ios-marketing",
       "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "AppIcon-1024@1x.png",
       "scale" : "1x"
     }
   ],
     "version" : 1,
     "author" : "xcode"
   }
-}
+}

ios/app/src/Images.xcassets/AppIconRelease.appiconset/Contents.json

       "scale" : "2x"
     },
     {
-      "idiom" : "ios-marketing",
       "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "AppIcon-1024@1x.png",
       "scale" : "1x"
     }
   ],
     "version" : 1,
     "author" : "xcode"
   }
-}
+}