message: Update license holder and years on license.
  Issue:
diff: @@ -186,7 +186,7 @@ Apache License
  same "printed page" as the copyright notice for easier
  identification within third-party archives.
  - Copyright {yyyy} {name of copyright owner}
  + Copyright (c) 2014-2019 BitGo, Inc.
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  