Adds 1.14 (477) protocol support, based on:
https://wiki.vg/index.php?title=Pre-release_protocol&oldid=14723
* New packets: SetDifficulty, LockDifficulty, UpdateJigsawBlock, UpdateViewPosition, UpdateViewDistance
* New metadata: Optional VarInt (17) and Pose (18)
* Add new join game variant with view distance, without difficulty
* Add new server difficulty variant, with locked boolean
* Implement recipe parsing changes, add stonecutting recipe type
Adds 18w50a (451) multiprotocol support, last snapshot of 2018
Reference: https://wiki.vg/index.php?title=Pre-release_protocol&oldid=14491
* Use v18w50a module for protocol
* Add blasting, smoking, and suspicious stew recipe types
* Add entity tags to tags packet
* Add chunk data packet variant with height map
* Add update light packet
* Add chunk format parsing with block_count, without skylights, conditionalize on protocol_version >= 451
* Add villager data entity metadata type parsing
https://wiki.vg/Pre-release_protocol#Entity_Metadata
* Add open book and entity sound effect packets
Adds support for 1.13.2 protocol (404)
Expands https://github.com/iceiix/steven/issues/18 Enhance protocol support
Metadata:
* Support 1.13.2 slot data format, bool and varint item id, optional damage (moved to NBT)
https://wiki.vg/index.php?title=Slot_Data&type=revision&diff=14363&oldid=7835
Packets:
* Add 1.13.2 packets, and implement all the command data parsers
https://wiki.vg/Command_Data#Parsers
* Send new plugin channel minecraft:brand
https://wiki.vg/Plugin_channels#minecraft:brand
* Add 1.13.2 metadata format, with shifted IDs
https://wiki.vg/Entity_metadata#Entity_Metadata_Format
* Implement particle entity metadata
* Add structures for 16 new packets
Blocks: The Flattening:
* Assign flattened IDs in correct order using new 'offset' macro token
* Assign hierarchical (pre-flattening) block IDs sequentially by counting Some data
* Split VANILLA_ID_MAP into flat/hier struct, to support before and after the flattening
* Extend travis build time to 20 minutes because the blocks macro takes a long time
* Support both flat/hier blocks by passing protocol_version to by_vanilla_id
Add block states and offsets for all blocks, replacing metadata for 1.13+:
* Add stripped logs and what was Log2 to Log
* Add the Wood blocks, should be called bark, previously Axis::None Log
* Add leaves distance and offset
* Add jungle/acacia to Leaves moved from Leaves2
* Add dispenser offsets, direction
* Add note block states
* Add offset None to Missing253 and Missing254, no holes in block states of 1.13.2
* Add bed colors
* Add seagrass, tall seagrass, remove redundant deadgrass, and piston offset
* Add torch, TNT, fire offsets, remove slabs
* Add furnance offset, merges lit into a property
* Add pressure plate offsets, new pressure plates, redstone ore/lit merged
* Add lever offsets, new directions from ceiling/floor, rename LeverDirections
* Add redstone torch offsets, new blocks since lit/unlit is now merged, and standing/wall is split
* Change lever to split face/facing, rm LeverDirection, add AttachedFace
* Add stone button offsets, face/facing similar to lever
* Move face/facing data and variant to AttachedFace, reuse for lever/stonebutton
* Add data_with_facing_and_powered() to AttachedFace, for lever/stonebutton
* Add wooden button offsets each wood
* Add pumpkin without a face
* Add carved pumpkin, portal offsets
* Add lit pumpkin (as jack-o-lantern) offsets after carved pumpkin
* Add repeater offsets, merged into Repeater
* Change brown mushroom block to booleans instead of MushroomVariant
* Add mushroom block offsets, red/brown mushroom blocks, and a new mushroom stem block
* Add command block, cobblestone walls, and flower pot offsets
Empty flower pot, and potted plants including saplings. Rename
variant DarkOak to DarkOakSaplings because it is a sapling, and
remove the duplicate Dandelion variant which causes duplicate blocks.
* Increase recursion limit in steven_blocks
* Add colored banner offsets
* Add wooden slab including double slab, in a different position for pre-1.13 and 1.13
* StoneSlabVariant::Wood -> StoneSlabVariant::PetrifiedWood
* Add fence_gate_offset() for wooden fence gates
* Add frosted ice age, offset
* Add new blocks: kelp, turtle egg, coral, coral fans, sea pickle, blue ice, smooth stone
* Add new blocks: conduit, void air, cave aid, bubble column, last of the 1.13 blocks
Cleans up https://github.com/iceiix/steven/pull/57 1.8.9 (47) multiprotocol support
which added too much code duplication, Metadata19 vs Metadata18, and
different packets for each, the only difference being how it was parsed.
Instead, switch back to using only one Metadata implementation, but with
parsing conditionalized on a new global mutable: SUPPORTED_PROTOCOL_VERSION.
Accessing global mutable state is unsafe but it is only set when
initializing the connection, and only read when deep enough in the code
where it is not feasible to pass otherwise. More elegant, worth it.
* Remove seemingly unneeded const on MetadataKey<T> new
* Change biome temperature/moisture to integer, x100 to remove floating-point so can use within stable 'const fn'
* Remove unstable const_fn feature, now using stable const fn: see https://www.reddit.com/r/rust/comments/9msqfn/const_fn_soon_on_stable_rust/
* Test on Rust beta (awaiting 1.31 release for stable)
* Update readme for beta Rust support
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