Bump discord-py from 2.2.0 to 2.2.2

Bumps [discord-py](https://github.com/Rapptz/discord.py) from 2.2.0 to 2.2.2.
- [Release notes](https://github.com/Rapptz/discord.py/releases)
- [Commits](https://github.com/Rapptz/discord.py/compare/v2.2.0...v2.2.2)

---
updated-dependencies:
- dependency-name: discord-py
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,6 +1,6 @@
 asyncio==3.4.3
 colorama==0.4.6
-discord.py==2.2.0
+discord.py==2.2.2
 emoji==2.2.0
 prettytable==3.6.0
 psutil==5.9.4