chore(deps): bump numpy from 1.18.5 to 1.21.0 (#26)

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.5 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@v1.18.5...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>

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ future==0.18.2
 joblib==0.15.1
 kiwisolver==1.2.0
 matplotlib==3.2.1
-numpy==1.18.5
+numpy==1.21.0
 protobuf==3.12.2
 pyparsing==2.4.7
 python-dateutil==2.8.1