Allow startInstant to be modified after the state started

[SimplyMerlin]

Hey,

I've been looking for a way to change the duration of a state while it already started. Think of for example cubecraft's pregame timer going down to 10 seconds when a certain amount of people hava joined. Could this be implemented in anyway? I made a not so elegant solution for this problem in a fork simply by just making startInstant to be modified (which then allows you to change startInstant to Instant.now() and then set the Duration to whatever you want for a new countdown). I assume there are way better ways to implement this.

TL;DR allow resetting and modifying the duration of a state after it already started

thanks.

[Minikloon]

The project is too old. I don't think I will personally change it.

[vhagedorn]

maybe he'll merge it if you make a pr