Update build pipeline

Author: mintuz

package.json

@@ -26,7 +26,7 @@
     "prepublish": "npm run build",
     "prettier": "prettier --single-quote --tab-width=4 --print-width=80 \"./src/**/*.js\" \"./test/**/*js\" --write",
     "babel": "babel src --out-dir dist --ignore '**/*.test.js'",
-    "test": "jest --coverage --no-cache",
+    "test": "npm run build && jest --coverage --no-cache",
     "build": "npm run babel",
     "jest": "jest --watch"
   },