Bump numpy from 1.16.2 to 1.22.0 in /ci

Bumps [numpy](https://github.com/numpy/numpy) from 1.16.2 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](numpy/numpy@v1.16.2...v1.22.0)

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

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

Author: dependabot[bot]

ci/requirements-tests.txt

@@ -13,7 +13,7 @@ execnet==1.5.0            # via pytest-cache
 future==0.17.1
 mccabe==0.6.1             # via pytest-mccabe
 more-itertools==5.0.0     # via pytest
-numpy==1.16.2
+numpy==1.22.0
 pep8==1.7.1               # via pytest-pep8
 pluggy==0.9.0             # via pytest
 py==1.8.0                 # via pytest