v0.4.3

This release contains bugfixes and marks the final release of the v0.4.x branch.
Future development will continue on the v0.5.x branch.

Thanks to the following for their contributions:

• @acdenisSK
• @ThatsNoMoon
• @zeyla

Added

• [model] Add Guild::member_permissions (@zeyla) c:2ba4d03

Changed

• [model] Rename Guild::permissions_for to Guild::permissions_in, keep an
  alias (@zeyla) c:dcac271

Fixed

• [model] Make Member::permissions return guild-level permissions (@zeyla)
  c:d3eddc6

Misc.

• [model] Add some docs to BanOptions (@acdenisSK) c:c99091d
• [model] Have Guild::has_perms use Guild::member_permissions (@zeyla)
  c:1b7101f
• [http] Slightly clarify ratelimiting documentation (@zeyla) c:3be6e2e
• [docs] Fix ping bot example (@ThatsNoMoon) c:800e58f
• [docs] Use consistent token names in examples (@zeyla) c:e219a6a