WPS-Backend v0.5.5

• adding Django connection refresh

WPS-Backend v0.5.4

• refactoring
• minor fixes

WPS-Backend v0.5.3

• refactoring
• improved error handling
• removing remaining traces of Python 2 backward compatibility
• adding queue inspection methods

WPS-Backend v0.5.2

• allowing use of IPv4 sockets

WPS-Backend v0.5.1

• improving logging and error handling

WPS-Backend v0.5.0

• Python 3, Django 2.2 support

WPS-Backend v0.4.2

• Fixing apps initialization in Django 1.11

WPS-Backend v0.4.1

• calling job discard callback when a new job cannot be pushed in queue

WPS-Backend v0.4.0

• restarting workers after configured amount of jobs
• worker pre-loading

Update release.

• Special treatment of the OWS 1.1 exceptions.
• Support for custom context callbacks.