Bump pipdeptree from 2.0.0 to 2.1.0 in /src/requirements

Bumps [pipdeptree](https://github.com/naiquevin/pipdeptree) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/naiquevin/pipdeptree/releases)
- [Changelog](https://github.com/naiquevin/pipdeptree/blob/master/CHANGES.md)
- [Commits](https://github.com/naiquevin/pipdeptree/compare/2.0.0...2.1.0)

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

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

src/requirements/production.txt

@@ -27,7 +27,7 @@ ipython==7.25.0
 irc3==1.1.7
 lxml==4.6.3
 olefile==0.46
-pipdeptree==2.0.0
+pipdeptree==2.1.0
 psycopg2-binary==2.9.1
 pyOpenSSL==20.0.1
 PyPDF2==1.26.0