Bump numpy from 1.20.3 to 1.21.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.20.3 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/v1.20.3...v1.21.0)

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

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

requirements.txt

@@ -3,7 +3,7 @@ chardet==4.0.0
 demjson
 fake-useragent==0.1.11
 idna==2.10
-numpy==1.20.3
+numpy==1.21.0
 pandas==1.2.4
 python-dateutil==2.8.1
 pytz==2021.1