chore - migrate to CircleCI 2.0; resolves #359.

.circleci/config.yml

@@ -0,0 +1,20 @@
+version: 2
+
+jobs:
+  test:
+    docker:
+      - image: circleci/python:2.7
+    steps:
+      - checkout
+      - run:
+          name: Install deps
+          command: sudo make install && sudo make dev-install
+      - run:
+          name: Run tests
+          command: make test
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test

circle.yml

@@ -1,9 +0,0 @@
-dependencies:
-  override:
-    - pip install -r requirements.txt
-    - pip install -r test-requirements.txt
-
-test:
-  override:
-    - make lint
-    - make test