* Allow to modify/create EXIF GPS* tags Make `tag_is_ascii` aware of the EXIF GPS* ASCII tags that are available since libexif 0.6.23. See: https://github.com/lovell/sharp/issues/2767 * Add tests
* Allow to modify/create EXIF GPS* tags Make `tag_is_ascii` aware of the EXIF GPS* ASCII tags that are available since libexif 0.6.23. See: https://github.com/lovell/sharp/issues/2767 * Add tests