Bump ipython from 6.2.1 to 7.16.3

Bumps [ipython](https://github.com/ipython/ipython) from 6.2.1 to 7.16.3.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](https://github.com/ipython/ipython/compare/6.2.1...7.16.3)

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

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

requirements.txt

@@ -8,7 +8,7 @@ entrypoints==0.2.3
 html5lib==1.0.1
 idna==2.6
 ipykernel==4.8.0
-ipython==6.2.1
+ipython==7.16.3
 ipython-genutils==0.2.0
 ipywidgets==7.1.1
 jedi==0.11.1