Bump idna from 3.4 to 3.7

Bumps [idna](https://github.com/kjd/idna) from 3.4 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.4...v3.7)

---
updated-dependencies:
- dependency-name: idna
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements.txt

@@ -47,7 +47,7 @@ fqdn==1.5.1
     # via jsonschema
 hsds-schema-tools @ git+https://github.com/openreferral/hsds_schema_tools
     # via -r requirements.in
-idna==3.4
+idna==3.7
     # via
     #   jsonschema
     #   requests