Merge pull request #164 from scikit-learn-contrib/circleci-python36

Test circleci with python 3.6 instead of 3.5.

Author: dukebody

.circleci/config.yml

@@ -1,23 +1,15 @@
 version: 2
 jobs:
-  test_py35:
+  test:
     docker:
-      - image: circleci/python:3.5
+      - image: circleci/python:3.6
     steps:
       - checkout
       - run: pip install --user tox
-      - run: ~/.local/bin/tox -e py35
-  test_py27:
-    docker:
-      - image: circleci/python:2.7
-    steps:
-      - checkout
-      - run: pip install --user tox
-      - run: ~/.local/bin/tox -e py27
+      - run: ~/.local/bin/tox
 
 workflows:
   version: 2
   build_and_test:
     jobs:
-      - test_py35
-      - test_py27
+      - test