fix npm test

Author: typicode

package.json

@@ -8,7 +8,7 @@
     "test": "test"
   },
   "scripts": {
-    "test": "cross-env NODE_ENV=test jest && npm run lint",
+    "test": "npm run build && cross-env NODE_ENV=test jest && npm run lint",
     "start": "run-p start:**",
     "start:babel-node": "babel-node src/cli/bin db.json -r routes.json",
     "start:webpack": "webpack -d --watch",