Update plugins for newer glslify to cope with esprima-six unpublish. Closes GH-60
Update plugins for newer glslify to cope with esprima-six unpublish. Closes GH-60

z3t0/voxelmetaverse,deathcap/voxelmetaverse,z3t0/voxelmetaverse,deathcap/voxelmetaverse,z3t0/voxelmetaverse,deathcap/voxelmetaverse