3.0
Implemented forward-compatible Clock-Interface
The stella-maris/clock package provides an interface based on the currently proposed status of PSR-20. Due to the inactivity of the PSR20 working group this is a way to already provide interoperability while still maintaining forward compatibility. When the current status of PSR20 will be released at one point in time the stella-maris/clock package will extend the PSR-20 interface so that this package becomes immeadiately PSR20 compatible without any further work necessary.