Bump numpy from 1.18.3 to 1.22.0 in /app

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.3 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@v1.18.3...v1.22.0)

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

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

Author: dependabot[bot]

app/requirements_dev.txt

@@ -1,5 +1,5 @@
 matplotlib==3.2.1
-numpy==1.18.3
+numpy==1.22.0
 pandas==1.0.3
 seaborn==0.10.1
 sns==0.1