v0.5.2

This release contains the usual bugfixes and helper methods.

Thanks to the following for their contributions:

- [@acdenisSK]
- [@FelixMcFelix]
- [@ForsakenHarmony]
- [@jkcclemens]
- [@Lakelezz]
- [@megumisonoda]
- [@Roughsketch]
- [@Scetch]
- [@xentec]
- [@zeyla]

- [builder] Generalize `CreateEmbed` method parameters ([@acdenisSK])
  [c:f115c17]
- [http] Add 'Get Guild Vanity Url' endpoint ([@zeyla]) [c:dbfc06e]
- [framework] Add `unrecognized_command` method ([@Lakelezz]) [c:2937792]
- [client] Add documentation to `EventHandler` ([@acdenisSK]) [c:80dfcb0]
- [http] Support sending files with an embed ([@Scetch]) [c:7e0d908]

- [voice] Add `Drop` impl for ffmpeg container ([@FelixMcFelix]) [c:3d67a4e]
- [model] Pad user discrims in `content_safe` ([@megumisonoda]) [c:2ab714f]
- [framework] Properly check if `Args` input is empty ([@acdenisSK])
  [c:beebff5]
- [voice] Backport [c:7d162b9] (voice fixes) ([@FelixMcFelix]) [c:9baf167]
- [framework] Fix no-cache StandardFramework compilations ([@Lakelezz])
  [c:02dc506]
- [builder] Make `CreateEmbed` and `CreateMessage` consistent ([@acdenisSK])
  [c:77c399b]
- [framework] Fix `help` command precedence ([@acdenisSK]) [c:c6a5fe4]
- [gateway] Fix heartbeat checking ([@zeyla]) [c:21fe999]
- [framework] Fix `Args::is_empty` behaviour ([@acdenisSK]) [c:e5bcee7]
- [framework] Add `Args::full_quotes` ([@acdenisSK]) [c:24d2233]
- [http] Do not include Optional params if None for audit logs ([@jkcclemens])
  [c:bd195de]
- [model] Handle deserializing `AuditLogEntry::target_id` ([@acdenisSK])
  [c:0d779ba]
- [model] Fix `AuditLogOptions` to be correct types ([@acdenisSK], [@jkcclemens]) [c:217e1c6], [c:2791ed7]

- [builder] DRY in `CreateEmbed` builder methods
  ([@xentec], [@acdenisSK], [@zeyla]) [c:2e1eb4c] [c:d8c9d89], [c:a4cc582],
  [c:ffc5ea1]
- [builder] Inline some CreateEmbed builder methods ([@acdenisSK]) [c:e814e9a]
- [framework] Add tests for empty messages ([@Lakelezz]) [c:d0ae9bb]
- [general] Remove useless clones ([@Roughsketch]) [c:b71d99f]
- [framework] Add `no_run` to doctests that instantiate a Client
  ([@Roughsketch]) [c:003dc2e]
- [general] Don't create enums and IDs via macros ([@ForsakenHarmony])
  [c:fdcf44e]
- [framework] Short-circuit on errors ([@acdenisSK]) [c:82e21a6]
- [model, utils] Fix nsfw related docs ([@Lakelezz]) [c:7f09642]
- [framework] Improve docs for `Args` ([@acdenisSK]) [c:b9fa745]
- [general] Fix some documentatoin typos ([@Lakelezz]) [c:e506e9f]

[@acdenisSK]: https://github.com/acdenisSK
[@FelixMcFelix]: https://github.com/FelixMcFelix
[@ForsakenHarmony]: https://github.com/ForsakenHarmony
[@jkcclemens]: https://github.com/jkcclemens
[@Lakelezz]: https://github.com/Lakelezz
[@megumisonoda]: https://github.com/megumisonoda
[@Roughsketch]: https://github.com/Roughsketch
[@Scetch]: https://github.com/Scetch
[@xentec]: https://github.com/xentec
[@zeyla]: https://github.com/zeyla

[c:003dc2e]: https://github.com/zeyla/serenity/commit/003dc2eed0f09cd214373f1581b7794d1483a689
[c:02dc506]: https://github.com/zeyla/serenity/commit/02dc5064d9402f73ef514c9b8ffa318f5d4235ff
[c:0d779ba]: https://github.com/zeyla/serenity/commit/0d779ba85ad43eb7e95be3844ad3fcd74335b47c
[c:21fe999]: https://github.com/zeyla/serenity/commit/21fe999d23cb0e4e76812537b48edadeab5a1540
[c:217e1c6]: https://github.com/zeyla/serenity/commit/217e1c6ebd9577fa5a538b4ecd3c1303ee034462
[c:24d2233]: https://github.com/zeyla/serenity/commit/24d2233ba583221b35eca02cf321e7a4a1adf76d
[c:2791ed7]: https://github.com/zeyla/serenity/commit/2791ed78df18f2721264352611b1ba26b3077196
[c:2937792]: https://github.com/zeyla/serenity/commit/29377922d3d79848efcb8d3bd0fbd52c21e81c5d
[c:2ab714f]: https://github.com/zeyla/serenity/commit/2ab714f9c3683db83eba1f6fe7bb3887a47d4f3f
[c:2e1eb4c]: https://github.com/zeyla/serenity/commit/2e1eb4c35b488ac68a33e76502d0c8f56a72c4b6
[c:3d67a4e]: https://github.com/zeyla/serenity/commit/3d67a4e2cd33b17747c7499e07d0a0e05fe73253
[c:5166a0a]: https://github.com/zeyla/serenity/commit/5166a0a81bac494b0e337d00f946a85d65e4bbbd
[c:77c399b]: https://github.com/zeyla/serenity/commit/77c399ba7b3bff0cf3180df5edad5d6ff6dcb10d
[c:7d162b9]: https://github.com/zeyla/serenity/commit/7d162b96686a56eed052984c18f22f54ad76f780
[c:7e0d908]: https://github.com/zeyla/serenity/commit/7e0d9082fe0262c7b4c4668ca1e1208dffa4796f
[c:7f09642]: https://github.com/zeyla/serenity/commit/7f09642fa66517fc983f63bb2e414638382a6512
[c:80dfcb0]: https://github.com/zeyla/serenity/commit/80dfcb0539c88e9434dc4875d5af55df1aafa725
[c:82e21a6]: https://github.com/zeyla/serenity/commit/82e21a61ae17d8466834f486108d1ace2791efc4
[c:9baf167]: https://github.com/zeyla/serenity/commit/9baf1675b0d1837fe010cfbadac8e80fd9d53898
[c:a4cc582]: https://github.com/zeyla/serenity/commit/a4cc5821c0ca194d321141985cfaf30241f54acf
[c:b71d99f]: https://github.com/zeyla/serenity/commit/b71d99fde84135fa66f73c4817d340ffbe8bddae
[c:b9fa745]: https://github.com/zeyla/serenity/commit/b9fa7457c2011130b28f5eca063f88bdf72be544
[c:bd195de]: https://github.com/zeyla/serenity/commit/bd195dea4422f516b727868209116ff868e3941b
[c:beebff5]: https://github.com/zeyla/serenity/commit/beebff50eb4f447f41162299fde81cb6fa9b336d
[c:c6a5fe4]: https://github.com/zeyla/serenity/commit/c6a5fe4ef9dc07b9b14f742440a35ba6ea02058b
[c:d0ae9bb]: https://github.com/zeyla/serenity/commit/d0ae9bba89d5e66129da7bed7faf39abfd4fb17d
[c:d8c9d89]: https://github.com/zeyla/serenity/commit/d8c9d89c80ffb0ae95b91c4dcc593fd70fa976d8
[c:dbfc06e]: https://github.com/zeyla/serenity/commit/dbfc06e9c6df506839fb178eaeb9db704aefd357
[c:e506e9f]: https://github.com/zeyla/serenity/commit/e506e9f30584d0fd67bf28a33b1033c4f1e5cd8b
[c:e5bcee7]: https://github.com/zeyla/serenity/commit/e5bcee7b2c2d2ff873982c6a3bf39ab16ec4e1e3
[c:e814e9a]: https://github.com/zeyla/serenity/commit/e814e9aa9b6117defa4f885ef0027e61706112d5
[c:f115c17]: https://github.com/zeyla/serenity/commit/f115c177def1a35fc532c896713a187bb468088e
[c:fdcf44e]: https://github.com/zeyla/serenity/commit/fdcf44e1463e708cd8b612c183e302db9af0febd
[c:ffc5ea1]: https://github.com/zeyla/serenity/commit/ffc5ea1da38cb7d9c302fa8d5614253c1f361311