Housekeeping.
Synced composer.json [ci skip]
Merge branch 'develop' of https://github.com/koden-km/agenda into koden-km-develop

Conflicts:
	composer.json
	composer.lock
Renamed 'constants' to 'predefined' to match normal naming.
Merge branch 'develop' of github.com:IcecaveStudios/agenda into develop