Bump idna from 3.7 to 3.10

Bumps [idna](https://github.com/kjd/idna) from 3.7 to 3.10.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.7...v3.10)

---
updated-dependencies:
- dependency-name: idna
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -7,7 +7,7 @@ charset-normalizer==3.3.2
 discord.py==2.4.0
 docopt==0.6.2
 frozenlist==1.4.1
-idna==3.7
+idna==3.10
 irc3==1.1.10
 multidict==6.0.5
 venusian==3.1.0