build(deps): update hikari requirement from ~=2.0.0.dev121 to ~=2.0.0…

….dev122 (#368)

Updates the requirements on [hikari](https://github.com/hikari-py/hikari) to permit the latest version.
- [Release notes](https://github.com/hikari-py/hikari/releases)
- [Changelog](https://github.com/hikari-py/hikari/blob/master/CHANGELOG.md)
- [Commits](hikari-py/hikari@2.0.0.dev121...2.0.0.dev122)

---
updated-dependencies:
- dependency-name: hikari
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1 +1 @@
-hikari~=2.0.0.dev121
+hikari~=2.0.0.dev122