chore(deps): bump numpy from 1.18.5 to 1.19.4

Bumps [numpy](https://github.com/numpy/numpy) from 1.18.5 to 1.19.4.
- [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/v1.18.5...v1.19.4)

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

Pipfile.lock

@@ -18,10 +18,10 @@
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@@ -64,30 +64,43 @@
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@@ -192,10 +205,10 @@
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@@ -322,10 +335,10 @@
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@@ -343,10 +356,10 @@
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