Bump mysqlclient from 2.0.3 to 2.1.0

Bumps [mysqlclient](https://github.com/PyMySQL/mysqlclient) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/PyMySQL/mysqlclient/releases)
- [Changelog](https://github.com/PyMySQL/mysqlclient/blob/main/HISTORY.rst)
- [Commits](PyMySQL/mysqlclient@v2.0.3...v2.1.0)

---
updated-dependencies:
- dependency-name: mysqlclient
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -13,7 +13,7 @@ ansicolors==1.1.8
 WTForms==3.0.1
 Werkzeug==1.0.1
 requests==2.27.1
-mysqlclient==2.0.3
+mysqlclient==2.1.0
 cryptography==36.0.1
 alembic==1.7.6
 PyJWT==2.3.0