Bump numpy from 1.16.4 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.16.4 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@v1.16.4...v1.22.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@ Flask==1.1.1
 html5lib==0.999
 httplib2==0.19.0
 nltk==3.4.5
-numpy==1.16.4
+numpy==1.22.0
 requests==2.20.0
 rake-nltk==1.0.4
 psycopg2==2.8.3