Bump ipython from 7.30.1 to 7.31.1 in /requirements (#401)

Bumps [ipython](https://github.com/ipython/ipython) from 7.30.1 to 7.31.1.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.30.1...7.31.1)

---
updated-dependencies:
- dependency-name: ipython
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/dev-requirements.txt

@@ -1,6 +1,6 @@
 black>=21.7b0
 ipdb==0.13.9
-ipython==7.30.1
+ipython==7.31.1
 flake8==4.0.1
 isort==5.10.1
 twine==3.7.1