Bump numpy from 1.18.3 to 1.18.4
Bump numpy from 1.18.3 to 1.18.4

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.3 to 1.18.4.
- [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/v1.18.3...v1.18.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
makism/dyfunconn