Add circle ci config

Author: stephentuso

.circleci/config.yml

@@ -0,0 +1,29 @@
+version: 2
+
+jobs:
+  build:
+    docker:
+      - image: circleci/node:8.9.4
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - yarn-cache-{{ .Branch }}
+            - dependency-cache-{{ checksum "yarn.lock" }}
+      - run:
+          name: Install dependencies
+          command: yarn install
+      - save_cache:
+          key: yarn-cache-{{ .Branch }}
+          paths:
+            - ~/.cache/yarn
+      - save_cache:
+          key: dependency-cache-{{ checksum "yarn.lock" }}
+          paths:
+            - ./node_modules
+      - run:
+          name: Build
+          command: yarn build
+      - run:
+          name: Test
+          command: yarn test

package.json

@@ -11,7 +11,8 @@
   ],
   "scripts": {
     "build": "babel src -d lib",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build",
+    "test": "echo TODO"
   },
   "repository": {
     "type": "git",