Bump numpy from 1.16.4 to 1.22.0 in /papers/SubTagger

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](https://github.com/numpy/numpy/compare/v1.16.4...v1.22.0)

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

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

papers/SubTagger/requirements_pip.txt

@@ -67,7 +67,7 @@ msgpack==0.5.6
 msgpack-numpy==0.4.3.2
 murmurhash==0.28.0
 nltk==3.4.3
-numpy==1.16.4
+numpy==1.22.0
 numpydoc==0.9.1
 overrides==1.9
 packaging==19.0