Bump numpy from 1.16.4 to 1.21.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.16.4 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](https://github.com/numpy/numpy/compare/v1.16.4...v1.21.0)

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

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

requirements.txt

@@ -13,7 +13,7 @@ importlib-metadata==0.17
 Jinja2==2.10.1
 MarkupSafe==1.1.1
 more-itertools==7.0.0
-numpy==1.16.4
+numpy==1.21.0
 packaging==19.0
 pluggy==0.12.0
 py==1.8.0

setup.py

@@ -74,7 +74,7 @@ setup(
     extras_require={
         'dev': [
             'future==0.17.1',
-            'numpy==1.16.4',
+            'numpy==1.21.0',
             'pytest-mock==1.10.4',
             'pytest==4.6.1',
             'Sphinx==2.1.0',