ci(release): call babel directly in prepack

Author: ttshivers

package.json

@@ -5,12 +5,11 @@
   "bin": "./dist/index.js",
   "main": "./dist/lib.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
     "build": "babel src --out-dir dist",
     "start": "node dist/index.js",
     "lint": "eslint .",
     "dev": "nodemon --exec babel-node src",
-    "prepack": "npm run build"
+    "prepack": "babel src --out-dir dist"
   },
   "repository": {
     "type": "git",