v0.5.1

Introducing nostrum 0.5.1 "I don't pick favourites", named after Craig's
favourite cat! The release brings support for threads, a decoder for incoming
voice data, integration events, modal submit interactions, and a bunch more
goodies!

A huge thanks to @Th3-M4jor, @BrandtHill, @frm and @kianmeng for their
contributions to this release!

If you're using streamlink for voice streaming, you may need to update it to >=
3.0 for this release, in order for the stream URL feature to work properly.

Functionality

• Threads
  • Added support for threads:
    • Added Nostrum.Api functions for working with threads
    • Add thread events in the consumer
    • Added struct definitions for thread events
• Voice
  • Use streamlink directly for determining stream URLs
  • Add support for persisting playback across channels
  • Remove dependency to porcelain in favour of native ports
  • Add opus packet decoding, allowing to save received audio as .ogg files
• Interactions
  • Add support for modal submit interactions and the associated text input type
• Integrations
  • Expand stub integration events to proper types
  • Document integration events & cast them to event structs
• Update to API v9

Documentation

• Fix a bunch of typos