can't switch from fullscreen to windowed mode

[LastExceed]

to switch to windowed mode the monitor ptr must be set to null, however the monitor param of kgl's window.setMonitor() function is non-nullable, making this operation impossible

[Dominaezzz]

Ah rip, that's a bug.

If you're not using mpp you can call glfwSetWindowMonitor directly as a workaround.

Feel free to send a PR in the meantime. Dunno when I'll get to this myself.

[nlbuescher]

Created a fix. CI failed because of apt though. Gonna try again tomorrow.

[nlbuescher]

fixed with #34. Will be in next release