- Enable tests.

- Update to 0.17.1:
* Update README and INSTALL docs
* Allow linux libdir name to be 'lib64' or 'lib'
* Test localised exception with non-ASCII characters
- Updates from 0.17.0:
* API change: derived classes of BasicIo are omitted from Python.
* enableBMFF() function is deprecated.
* Documentation is available on
https://python-exiv2.readthedocs.io/
- Updates from 0.16.2:
* Removed AnyError alias of Exiv2Error exception.
* Metadatum.print() method is no longer renamed to _print.
* Improved handling of enums:
* Enum results are returned as Python enum instead of int.
* Passing ints as enum parameters is deprecated.
* Added dict-like behaviour to "data" structs.
* Log handlers can be set/cleared from Python.
* SWIG v4.1.0 or later required to run SWIG.
- Updates from 0.16.0:
* Include native language support in Windows binary wheel builds.
* API change: DateValue.getDate() returns Python dict.
* API change: TimeValue.getTime() returns Python dict.
* Deprecated: exiv2.Date and exiv2.Time objects.
* Added buffer interface to PreviewImage
* Set datum value from Python object directly instead of via
string.
* Moved Position enum to BasicIo class.
* Moved CharsetId enum to CommentValue class.