Bump numpy from 1.19.4 to 1.20.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.4 to 1.20.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/master/doc/HOWTO_RELEASE.rst.txt)
- [Commits](https://github.com/numpy/numpy/compare/v1.19.4...v1.20.0)

requirements.txt

@@ -11,7 +11,7 @@ matplotlib==3.3.3
 mlxtend==0.18.0
 more-itertools==8.6.0
 numba==0.52.0
-numpy==1.19.4
+numpy==1.20.0
 outlier==0.2
 utils==1.0.1
 outlier-utils==0.0.3