Bump numpy from 1.17.3 to 1.17.4

Bumps [numpy](https://github.com/numpy/numpy) from 1.17.3 to 1.17.4.
- [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/v1.17.3...v1.17.4)

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

Pipfile.lock

@@ -24,30 +24,30 @@
         },
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+                "sha256:0a7a1dd123aecc9f0076934288ceed7fd9a81ba3919f11a855a7887cbe82a02f",
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+                "sha256:e2e9d8c87120ba2c591f60e32736b82b67f72c37ba88a4c23c81b5b8fa49c018",
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             ],
             "index": "pypi",
-            "version": "==1.17.3"
+            "version": "==1.17.4"
         },
         "sgp4": {
             "hashes": [
@@ -73,10 +73,10 @@
     "develop": {
         "astroid": {
             "hashes": [
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             ],
-            "version": "==2.3.2"
+            "version": "==2.3.3"
         },
         "isort": {
             "hashes": [
@@ -136,10 +136,10 @@
         },
         "six": {
             "hashes": [
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+                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
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-            "version": "==1.12"
+            "version": "==1.13.0"
         },
         "typed-ast": {
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