Advanced Spawners

Version 0.4:

• Tested on 1.13.2 & 1.12.2. (could still work for newer/older, but try at your own risk)
• Spawners can no longer be renamed with Anvils to change a spawner's type.
• Finished/fixed the give subcommand. The correct usage of the command is (note: [] is required, <> is optional):

  /advancedspawners give [mobtype] <level> <amount> <player>

• Fixed bug where spawners could be mined without the Silk Touch enchantment.
  
• Breaking a spawner without the Silk Touch enchantment while sneaking won't give a warning: the spawner will break instantly.
• Fixed bug in /as enable command: toggling the option with the command toggled the lock setting instead.
• Fixed GUI bug where clicking on the border items (the glass panes) makes you go to the Spawner menu.
• Minor bug fixing.