title: Cannot read property 'env' of undefined while building nativescript-vue project
body: <p>When I building nativescript-vue application using "tns build android --bundle" it shows</p>
  
  <p>Project successfully prepared (android)</p>
  
  <p>Executing after-prepare hook from D:\Downloads\User\Desktop\App\hooks\after-prepare\nativescript-dev-webpack.js</p>
  
  <p>Cannot read property 'env' of undefined</p>