CircleCI project setup (#138)

packages/medusa-test-utils/package.json

@@ -9,6 +9,7 @@
     "directory": "packages/medusa-test-utils"
   },
   "scripts": {
+    "test": "jest",
     "build": "babel src --out-dir dist/ --ignore **/__tests__",
     "prepare": "cross-env NODE_ENV=production npm run build",
     "watch": "babel -w src --out-dir dist/ --ignore **/__tests__"