update to circleci 2.0

Author: TimBest

.circleci/config.yml

@@ -0,0 +1,20 @@
+version: 2
+jobs:
+  build:
+    working_directory: ~/django-multi-form-view
+    docker:
+      - image: circleci/python:3.6.4
+    steps:
+      - checkout # checkout source code to working directory
+      - run:
+          name: Install Python deps in a venv
+          command: |
+            python3 -m venv venv
+            . venv/bin/activate
+            pip3 install --upgrade pip
+            pip3 install -r requirements.txt
+      - run:
+          name: run behave test
+          command: |
+            coverage run demo/manage.py behave
+            codecov