Bump numpy from 1.19.4 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.4 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@v1.19.4...v1.22.0)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 pymagicc==2.0.0
-numpy==1.19.4
+numpy==1.22.0
 pandas==1.1.5
 matplotlib==3.3.3
 f90nml==1.1.2