Changes between #1690 and #1691

#1691 (Nov 19, 2019, 10:12:17 PM)

1. backport last commit to 1.13 and 1.12 (commit: 5d0115a) — agoodwin / detail
2. fix errors from non-deadly mobs in weapon_damage (commit: 7e6ab8b) — agoodwin / detail
3. add LocationTag.local_difficulty (commit: 0d948c8) — agoodwin / detail