Bump numpy from 1.18.1 to 1.22.0 in /NLP/ACL2020-GraphSum

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] <support@github.com>

Author: dependabot[bot]

NLP/ACL2020-GraphSum/requirements.txt

@@ -1,5 +1,5 @@
 nltk==3.4.5
-numpy==1.18.1
+numpy==1.22.0
 paddlepaddle-gpu==1.6.3.post107
 pyrouge==0.1.3
 regex==2020.2.20