message: Minor change copyright year
  Match years shown in header of code
diff: @@ -211,7 +211,7 @@ It will output all documentation under `/dist/doc`.
  ## License
  -Copyright (C) 2018-2019 HERE Europe B.V.
  +Copyright (C) 2017-2019 HERE Europe B.V.
  See the [LICENSE](./LICENSE) file in the root of this project for license details about using `harp.gl`.
  