Bump ipython from 3.2.1 to 7.16.3 in /esp

Bumps [ipython](https://github.com/ipython/ipython) from 3.2.1 to 7.16.3.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@rel-3.2.1...7.16.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

esp/requirements.txt

@@ -19,7 +19,7 @@ git+https://github.com/learning-unlimited/django-admin-tools.git@esp # Extends D
 # Non-Django-specific packages
 docutils==0.12 # Needed for django.contrib.admindocs
 flake8==2.5.0 # Required for linter
-ipython==3.2.1 # Used for shell_plus
+ipython==7.16.3 # Used for shell_plus
 Markdown==2.3.1 # Used in QSD
 numpy==1.16.6 # Used mainly in the lottery and class change controller
 pillow==6.2.2 # Required for ImageField, which we use in teacher bios