Update README.md

Author: rohitgeo

README.md

@@ -28,7 +28,7 @@ Find a bug or want to request a new feature?  Please let us know by submitting a
 Anyone and everyone is welcome to contribute. Please see our [guidelines for contributing](https://github.com/esri/contributing).
 
 ## Licensing
-Copyright 2016 Esri
+Copyright 2016-2017 Esri
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.