3.12-shimmed1.13-patch2

• bugfix: additional NPE protection when player without clickinfo permission triggers skull update
• bugfix: resolve skull names correctly when the owner case changes (when account doesn't exist or case differs)
• updated: better default head skins (for now)
• speculative bugfix: ensure skeleton variants conditions correctly apply on updated entity types
• bugfix: wither skeleton / wither boss entity type names updated in config and lang (solves wither boss head showing incorrect name). This was probably broken since way back in 1.11 since the entity name changed from WitherBoss to Wither, and the entity name is used for reading skull names and drop rate config entries (the boss drop rate was reading witherdroprate and HEAD_WITHER which was originally intended for wither skeletons - these have been changed)

Backwards-incompatible changes:

• lang entries WITHER changed toWITHER_SKELETON to match entity name
• lang entries WITHER_BOSS changed to WITHER to match entity name
• config entry witherdroprate changed to witherskeletondroprate to match entity name
• config entry witherbossdroprate changed to witherdroprate to match entity name
  Associated config defaults were changed / can be regenerated on run without existing config.

Known bugs: wither skeleton drop rates still read from witherdroprate - this was fixed in patch3 but see Issue #4 before updating for why this may cause unforeseen behavior.