Ported over fossil, mineshaft, sold gem, slabs and vault blocks

Updated to Forge 1.16.4 and latest mappings

Port of bombs for 1.16, with some physics improvements

See merge request !5

Ported over spikes/powderboxes/pushblocks, all functioning, some bugs, though

improved the bounce frame handling

This port has a more elegant solution for this problem. This time I didn't
override the World object used, instead I was able to control the raycasting in
my own code. I also improved the frame where we collide with a block to take
into account the distance we should travel away from the collision site during
the frame, instead of just snapping it to the hit position.

I commented out a section that seems to exist to add a Y offset, which I don't
quite understand yet.

Fixed Parachute, decided to not do stack.damageitem and instead stack.shrink

Near all items ported, saving the rest for later

Finally ported over dynamic light, so far the only held-items that give light are soul/normal torches and lanterns but Spectacles have been changed to give light instead of night vision

Implemented automatic generator for Forge mod-compatibility tags such as ingots/gems/etc

Updated 1.16.3 mappings

Ported over all the melee weapons, meaning that all the mod weapons are now fully ported over to 1.16

Ported over rock/skull/mattock head projectiles, will port flare and empty chest when blocks and dynamic-light is ported over

Finally fixed projectile rendering for real

Tweaked rocks for the final time, had to adjust aiming-code to make it consistent (accidentally broke the trajectory)