Bump numpy from 1.19.2 to 1.21.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.2 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@v1.19.2...v1.21.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@ itsdangerous==2.0.1
 gunicorn==20.0.4
 model-archiver==1.0.3
 multi-model-server==1.1.1
-numpy==1.19.2
+numpy==1.21.0
 pandas==1.1.3
 psutil==5.7.2
 python-dateutil==2.8.1