PyWPS-4.2.2 Released

New bugfix-release of PyWPS is finally produced, with following bugfixes

• Fixed scheduler extension (#480).
• Fixed ValuesReference implementation (#471, #484).
• Fixed AllowedValue range (#467, #464).
• Add metalink support to facilitate outputs with multiple files (#466).
• Rename async to async_ for Python 3.7 compatibility (#462).
• Improve queue race conditions (#455).
• Numerous bug-fixes, additional tests and documentation improvements.