Update to use camera getVector(), fixes XYZ coordinate reversal

The orientations now match the three.js-based voxel-engine:

                       N
+Z North               ^          ^ +z
-Z South          W <--o--> E     |
+X East                v          +---> +x
-X West                S

Z and X are no longer swapped.

(from deathcap/game-shell-fps-camera@bfb7b233657fd82a330dd6696e84979011153e66)

+ Update voxel:

deathcap/voxel@2a92d917199aedc89267c60eb0687d3472a7ce2f Fix chunk array inconsistency, indices now ordered XYZ

Commit message generated by https://github.com/deathcap/lmno-cl