Kaushal Gosaliya

**Here is log error:** Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'io.flutter.plugin.common.BinaryMessenger io.flutter.embedding.engine.plugins.FlutterPlugin$FlutterPluginBinding.getBinaryMessenger()' on a null object reference at com.crazecoder.openfile.OpenFilePlugin.onAttachedToActivity(OpenFilePlugin.java:400) at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.attachToActivityInternal(FlutterEngineConnectionRegistry.java:351) at io.flutter.embedding.engine.FlutterEngineConnectionRegistry.attachToActivity(FlutterEngineConnectionRegistry.java:324) at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onAttach(FlutterActivityAndFragmentDelegate.java:189) at io.flutter.embedding.android.FlutterActivity.onCreate(FlutterActivity.java:498) at...

Please add hacktoberfest tag in this PR

Add this line in your manifest file. ` `