[x] I'd like to contribute [feature X|bugfix Y|docs|something else] to PyWPS. I confirm that my contributions to PyWPS will be compatible with the PyWPS license guidelines at the time of contribution.
[x] I have already previously agreed to the PyWPS Contributions and Licensing Guidelines
Overview
This PR updates the changelog in preperation of bug-fix release 4.2.2.
Related Issue / Discussion
488
Additional Information
Contribution Agreement
(as per https://github.com/geopython/pywps/blob/master/CONTRIBUTING.rst#contributions-and-licensing)