Bump idna from 3.3 to 3.7

Bumps [idna](https://github.com/kjd/idna) from 3.3 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.3...v3.7)

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

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

Author: dependabot[bot]

requirements.txt

@@ -26,7 +26,7 @@ ftfy==6.0.3
 future==0.18.2
 gemfileparser==0.8.0
 html5lib==1.1
-idna==3.3
+idna==3.7
 importlib-metadata==4.8.3
 inflection==0.5.1
 intbitset==3.1.0