Bump idna from 2.10 to 3.7 in /dev (#647)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/dev/requirements.txt b/dev/requirements.txt
index f99750e..dade91c 100644
--- a/dev/requirements.txt
+++ b/dev/requirements.txt
@@ -3,7 +3,7 @@
 chardet==4.0.0
 cryptography==3.4.6
 defusedxml==0.7.1
-idna==2.10
+idna==3.7
 jira==2.0.0
 oauthlib==3.1.0
 pbr==5.5.1