Silk Touch Spawners

This data pack allows using a silk touch pickaxe to pick up mob spawners.

When breaking mob spawners with regular (non-silk touch) tools, the behavior of the game is not affected; the mob spawner will break, and drop exp if mined with a pickaxe.
When breaking mob spawners with a silk touch pickaxe, no exp is dropped, and instead the spawner item is dropped.
When placed in the overworld, the spawner will spawn zombies, skeletons, or spiders (one will be randomly chosen during placement)
When placed in the nether, the spawner will spawn blazes.
When placed in the end, the spawner will spawn endermen.