Bump idna from 2.10 to 3.7

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](https://github.com/kjd/idna/compare/v2.10...v3.7)

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

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

setup.py

@@ -48,7 +48,7 @@ setuptools.setup(
         'slackclient==1.3.1',
         'icalendar',
         'pymsteams',
-        'idna==2.10'
+        'idna==3.7'
     ],
     extras_require={
         'ldap': ['python-ldap'],