Changes

add 'main' and 'offhand' switches to swaps item event
 (commit: c74755e)

add mech player.selected_npc
 (commit: a98e42c)

add player.client_brand
 (commit: 6d07fed)

add tag ElementTag.split_lines_by_width and text_width
 (commit: cf0fbd2)

add tag ElementTag.rainbow, fixes #2188
 (commit: ea7d1dd)

fix chunk height map handling in 1.15 and 1.14
 (commit: cf98d88)

add tag ElementTag.lines_to_colored_list
 (commit: 3d2ad86)

add tag LocationTag.has_loot_table
 (commit: c997161)

add mechanism LocationTag.clear_loot_table
 (commit: 6e78cf0)

add a warning at startup when java versions other than 8 are used
 (commit: 720f005)

remove 1.12 legacy crafting system
 (commit: bbeface)

experimental multi-match for item recipes
 (commit: e6d4277)

fix build
 (commit: 11a7f08)

support cuboid input into cuboid.include
 (commit: a5d7478)

clean up the worst messes of CuboidTag

Still a lot of nonsense but this is the parts that can be quickly made significantly better, and the parts that affect the majority of users
 (commit: 95e33c4)

is attribute.echoError in CuboidTag
 (commit: 3821db2)

add tag cuboidtag.with_world
 (commit: 202a8d8)

set new canRunScripts to false on types where that applies
 (commit: 12c234e)

use new script run internal API to push & shoot command
 (commit: 0744a75)

fix cuboid.add/set_member mech input
 (commit: 57ba920)

add entitytag.skin_layers tag+mech
 (commit: 8089d8a)

extra fix add/set member mechs
 (commit: 11afe99)

fix translated_name tag for blocks, fixes #2190

also special case wall banners
 (commit: 51b665b)

swap inventory.script_name to just .script
 (commit: 46f16f0)

(experimental) modifyblock event source argument
 (commit: bc334e0)

documentation regarding 'after' events
 (commit: a69bc74)

Allow offline player statistic viewing/setting (#2191)

 (commit: 54c4ff9)

Add Paper tag base and tick_times tag (#2192)

* Add Paper tag base and tick_times tag

* Return durations for paper tick_times

* Add missing paper key to docs
 (commit: b631601)

Add Paper beacon effect event, fixes #2148 (#2193)

 (commit: a2b14c5)

fix material half mechanism for chests
 (commit: 31ecf00)

spawn command required args and meta fixes
 (commit: d13d392)

clean and simplify interact script grabber, add future-dep notice
 (commit: 43e462d)

fix inventory conversion typo
 (commit: f3ac3ef)

Add server.current_tick tag (#2194)

 (commit: ece1e63)

add server tags real/delta_time_since_start
 (commit: 4e77b5e)

add xp context and determine to fish event, fixes #2195
 (commit: 875ccd6)

use new SkinTrait
 (commit: 9bd7b56)

fix 'changes sign' matcher oddity
 (commit: 9d40213)

remove some redundant meta
 (commit: 78a25d3)

allow specify a hash with the resource_pack mech
 (commit: 44313e5)

fix derped mech meta
 (commit: 05b7ba8)

improvements to the take command
 (commit: a3eeaec)

fix slot id format consistency in item damage events
 (commit: a8a0a1c)

material matchers should not count script items
 (commit: 899ff79)

use new ObjectTag.duplicate in types that might need it
 (commit: 6e1aa7f)

deprecate inventory add/remove, related cleaning
 (commit: c0b13c0)

fix bork with resource_pack hash
 (commit: b6dc5a3)

ItemInventory: operate as an item list, not inventory objects
 (commit: 82877d0)

update old meta
 (commit: ad2185d)

some meta fixes
 (commit: c6de45e)

fix beds being read backwards, fixes #2202

also equip command meta
 (commit: 93ab091)

narrating to an offline player shouldn't error
 (commit: 59ba299)

implement .full tag deprecations
 (commit: cafe4dd)