Bump numpy from 1.18.1 to 1.22.0 (#89)

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.1 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@v1.18.1...v1.22.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 msaf==0.1.70
 num2words==0.5.10
-numpy==1.18.1
+numpy==1.22.0
 praat-parselmouth==0.3.3
 PyAudio==0.2.11
 PyYAML==5.4.1