Bump numpy

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.5 to 1.21.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst.txt)
- [Commits](numpy/numpy@v1.19.5...v1.21.0)

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

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

Author: dependabot[bot]

machine-learning/recommender-system-using-association-rules/requirements.txt

@@ -1,6 +1,6 @@
 pandas==1.1.5
 mlxtend==0.14.0
-numpy==1.19.5
+numpy==1.21.0
 seaborn==0.11.1
 matplotlib==3.2.2
 matplotlib-inline==0.1.3