Bump numpy from 1.19.1 to 1.19.2 (#403)

Bumps [numpy](https://github.com/numpy/numpy) from 1.19.1 to 1.19.2.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/master/doc/HOWTO_RELEASE.rst.txt)
- [Commits](https://github.com/numpy/numpy/compare/v1.19.1...v1.19.2)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-numpy == 1.19.1
+numpy == 1.19.2
 scipy == 1.5.2
 pandas == 1.1.1
 matplotlib == 3.3.1