Bump ipython from 7.16.1 to 7.18.1 in /src/requirements (#643)

Bumps [ipython](https://github.com/ipython/ipython) from 7.16.1 to 7.18.1.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](https://github.com/ipython/ipython/compare/7.16.1...7.18.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

src/requirements/production.txt

@@ -23,7 +23,7 @@ future==0.18.2
 graphene-django==2.12.1
 html5lib==1.1
 icalendar==4.0.6
-ipython==7.16.1
+ipython==7.18.1
 irc3==1.1.6
 lxml==4.5.2
 olefile==0.46