Bump numpy from 1.20.3 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.20.3 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@v1.20.3...v1.22.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 madminer==0.9.3
-numpy==1.20.3
+numpy==1.22.0
 pandas==1.2.4
 pyyaml==5.4
 torchvision==0.7.0