Bump scikit-learn from 0.19.1 to 0.20.1

Bumps [scikit-learn](https://github.com/scikit-learn/scikit-learn) from 0.19.1 to 0.20.1.
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](scikit-learn/scikit-learn@0.19.1...0.20.1)

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

Author: dependabot-support

Pipfile

@@ -14,7 +14,7 @@ docopt = "==0.6.2"
 idna = "==2.6"
 numpy = "==1.13.3"
 requests = "==2.18.4"
-scikit-learn = "==0.19.1"
+scikit-learn = "==0.20.1"
 scipy = "==1.0.0"
 "urllib3" = "==1.22"