build: add circle 2 config

Author: eddyerburgh

.circleci/config.yml

@@ -0,0 +1,16 @@
+version: 2
+jobs:
+   build:
+     docker:
+       - image: circleci/node:4.8.2
+     steps:
+      - checkout
+      - run:
+          name: update-npm
+          command: 'sudo npm install -g npm@latest'
+      - run:
+          name: install-npm
+          command: npm install
+       - run:
+        name: test
+        command: npm test