release method

Implementation

@override
Future<void> release() async {
  try {
    await methodChannel.invokeMethod<void>('release');
  } on PlatformException {
    // Releasing is best effort - there is nothing useful to do if the native
    // side has already torn the interpreter down.
  } on MissingPluginException {
    // Nothing to release when the plugin is not in the binary.
  }
}