v0.5.5

This release is mostly a bugfix release. Thanks to the following for their
contributions:

• @acdenisSK
• @drklee3
• @foxbot
• @Lakelezz
• @Mishio595
• @perryprog
• @TheUnitedStatesOfAmerica
• @zeyla

Added

• [framework] Add Args::rest (@acdenisSK) c:9b2cd75
• [model] Add Message::guild_id structfield (@foxbot, @zeyla) c:a9e8626,
  c:3121f90
• [framework] Improve logic for displaying help (@Lakelezz) c:7937025
• [http] Add http::ratelimiting::offset (@zeyla) c:55555b8
• [cache] Make the Cache Update API public (@zeyla) c:9e56062
• [utils] Add associated consts in utils::Colour (@zeyla) c:bbfc8e2
• [model] impl From<&ID> for ID for all Id types ([@Zelya]) c:9e45642,
  c:530ea76
• [cache] Add a Message cache API (@zeyla) c:e602630
• [voice] Add streamer::ffmpeg_optioned (@zeyla) c:5dab87b, c:1f3a57e
• [model] Implement Mentionable for GuildChannel (@Mishio595) c:ce8da79
• [framework] Allow nil prefixes in DMs (@acdenisSK) c:10bbffe
• [model] Implement Mentionable for ChannelCategory, Group,
  PrivateChannel (@zeyla) c:dd3744b, c:8ce8234, c:d11d916, c:5abc7d1
• [framework] Add checks for groups (@Lakelezz) c:29480e5
• [framework] Support multiple prefixes for command groups (@Lakelezz)
  c:305d200
• [framework] Add default commands for command groups (@Lakelezz) c:40c8248,
  c:8aefde0

Fixed

• [framework] Handle debug impls better (@acdenisSK) c:caeab28, c:7eac4d5
• [framework] Reorder some dispatch checks to fix an owner override bug
  (@acdenisSK) c:8114a7a, c:93f453b
• [framework] Force Args::find{,_n} to be quote-aware (@acdenisSK)
  c:f0f06b7
• [framework] Fix an Args test (@zeyla) c:2ef660e
• [framework] Fix command visibility on no help (@Lakelezz) c:aeb89af
• [framework] Add missing Send + Sync bounds on Check (@acdenisSK)
  c:f09b661
• [utils] Fix utils::is_nsfw slicing (@acdenisSK, @zeyla) c:0067c33,
  c:ccd2506
• [utils] Fix nsfw- case in utils::is_nsfw (@zeyla) c:bd4aa0a
• [framework] Don't assume all characters at end are 1-length (@acdenisSK)
  c:4e4dcb1
• [framework] Don't suggest command if no command is related to input
  (@Lakelezz) c:614402f

Changed

• [model] Make Invite::guild and RichInvite::guild optional (@zeyla)
  c:3a647e3

Misc.

• [framework] Fix example typo (@perryprog) c:d0d363f
• [framework] Add more docs to Args (@acdenisSK) c:04b0be1
• [general] Fix extraneous spaces at the end of lines (@zeyla) c:6ddfef8
• [http] Add (late) april fool's functions (@TheUnitedStatesOfAmerica)
  c:5ffdcea
• Rename 6e1edde
• [framework] Remove some repitition repition (@acdenisSK) c:10f7548,
  c:1ec1086
• [docs] Add more docs to CreateEmbed::fields (@acdenisSK) c:703d135
• [docs] Remove some dead links (@acdenisSK, @Lakelezz) c:eae624e,
  c:4cf83d0
• [docs] Remove old notice about CreateEmbed::field (@acdenisSK) c:5b66ace
• [examples] Add CreateEmbed::field and CreateEmbed::fields usage to example
  11 (@drklee3) c:a9a2c27
• [general] Monomorphize all functions (@zeyla) c:7b9764c
• [general] Update README logo URI (@zeyla) c:2ff765b
• [docs] Fix doc links with no anchor (@zeyla) c:0d6e019
• [docs] Add docs for Args::new (@acdenisSK) c:b520ec7
• [general] Fix some clippy lints (@zeyla) c:9da7669