Use the version of scikit-learn that we use for testing

4 jobs for conda in 13 minutes and 55 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #149535
docker
build_linux_36

00:13:50

passed #149536
macosx
build_macosx_36

00:09:29

failed #149533
docker
build_linux_36

00:03:06

failed #149534
macosx
build_macosx_36

00:01:05