Update README.md

Change year to 2017

README.md

@@ -195,7 +195,7 @@ Become a sponsor and get your logo on our README on Github with a link to your s
 
 ## License
 
-Copyright (c) 2016 Twitter and [other contributors](https://github.com/bower/bower/graphs/contributors)
+Copyright (c) 2017 Twitter and [other contributors](https://github.com/bower/bower/graphs/contributors)
 
 Licensed under the MIT License