Bump numpy from 1.17.2 to 1.22.0 in /conv_graph

Bumps [numpy](https://github.com/numpy/numpy) from 1.17.2 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@v1.17.2...v1.22.0)

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

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

Author: dependabot[bot]

conv_graph/requirements.txt

@@ -8,7 +8,7 @@ matplotlib==3.1.1
 multidict==4.5.2
 networkx==2.4
 nltk==3.4.5
-numpy==1.17.2
+numpy==1.22.0
 PyYAML==5.4
 regex==2018.1.10
 scikit-learn==0.21.0