Bump idna from 2.10 to 3.10

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.10.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v2.10...v3.10)

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

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

Author: dependabot[bot]

requirements.txt

@@ -18,7 +18,7 @@ Flask-RESTful==0.3.9
 Flask-SQLAlchemy==2.5.1
 greenlet==2.0.1
 gunicorn==20.1.0
-idna==2.10
+idna==3.10
 itsdangerous==2.0.1
 Jinja2==3.0.3
 jmespath==0.10.0