chore(deps): bump numpy from 1.16.6 to 1.21.0 in /hate-speech-api (#515)

Bumps [numpy](https://github.com/numpy/numpy) from 1.16.6 to 1.21.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst.txt)
- [Commits](numpy/numpy@v1.16.6...v1.21.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

hate-speech-api/requirements.txt

@@ -4,7 +4,7 @@ Flask-Classful==0.14.2
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==1.1.1
-numpy==1.16.6
+numpy==1.21.0
 scikit-learn==0.20.4
 scipy==1.2.3
 Werkzeug==1.0.1