Bump numpy from 1.18.5 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.5 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](numpy/numpy@v1.18.5...v1.22.0)

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

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

requirements.txt

@@ -22,7 +22,7 @@ importlib-metadata==4.13.0
 matplotlib==3.3.1
 
 # Pin numpy to 1.18.5 due to tensorflow v2.1.1 hard pinning it to that version.
-numpy==1.18.5
+numpy==1.22.0
 pylint==2.5.3
 pytest==6.0.0
 pytest-xdist==1.34.0