message: added change to CHANGES.md
diff: @@ -203,6 +203,9 @@ let mut dataset = driver
  - <https://github.com/georust/gdal/pull/212>
  +- Added `set_error_handler` and `remove_error_handler` to the config module that wraps `CPLSetErrorHandlerEx`
  +
  + - <https://github.com/georust/gdal/pull/215>
  ## 0.7.1
  