1.0.0-RC3

Make version semvar compliant
Removes warning log from startup

Init emptiness map lazily if needed
Fixes #56

Fix large fill commands breaking light (Vanilla)
Vanilla didn't tell the client to recalculate the edges of the
light it checked, and nor did it even tell the client
to perform the light updates. So of course it broke on chunk edges.

Fix is to simply send the neighbouring light data as well.

Fixes #71

Relocate save/load hooks into their own class
This will make compatibility with starlight better in the future for
mods that mess around with chunk NBT.

There is no forge version for 1.17 yet, so there is no RC3 for forge. No, I will not backport RC3 to 1.16.