docs: Update LICENSE year. (#587)

Scott Hyndman · traviskaufman · commit 41c4f4676b9c · 2017-05-05T16:01:31.000-04:00
diff --git a/LICENSE b/LICENSE
@@ -187,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2015 Google Inc
+   Copyright 2017 Google Inc
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
