Bump numpy from 1.18.1 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.1 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@v1.18.1...v1.22.0)

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

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

requirements.txt

@@ -3,6 +3,6 @@ pandas==0.23.4
 seaborn==0.10.1
 tqdm==4.41.1
 joblib==1.2.0
-numpy==1.18.1
+numpy==1.22.0
 sphinx_rtd_theme==0.5.0
 Sphinx==3.1.2