Upgraded to support latest master version of Flutter

packages/zefyr/lib/src/widgets/input.dart

   final List<TextEditingValue> _sentRemoteValues = [];
   TextInputConnection _textInputConnection;
   TextEditingValue _lastKnownRemoteTextEditingValue;
+
+  @override
+  void updateFloatingCursor(RawFloatingCursorPoint point) {
+    // TODO: implement updateFloatingCursor
+  }
 }