title: 'ionic-app-scripts' is not recognized as an internal or external command, operable program or batch file
body: <p>i am updating the ionic version to latest, i try to run the my old project i am getting this errors</p>
  
  <p>'ionic-app-scripts' is not recognized as an internal or external command,
  operable program or batch file.</p>
  
  <p>npm ERR! Windows_NT 6.3.9600
  npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Users\user\AppData\R
  oaming\npm\node_modules\npm\bin\npm-cli.js" "run" "ionic:serve" "--" "--v2"
   "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"
  npm ERR! node v7.2.0
  npm ERR! npm  v4.0.5
  npm ERR! code ELIFECYCLE
  npm ERR! ionic-hello-world@ ionic:serve: <code>ionic-app-scripts serve "--v2" "--addr
  ess" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"</code>
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the ionic-hello-world@ ionic:serve script 'ionic-app-scripts
  serve "--v2" "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"'.</p>
  
  <p>npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the ionic-hello-world pac
  kage,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     ionic-app-scripts serve "--v2" "--address" "0.0.0.0" "--port" "8100
  " "--livereload-port" "35729"
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs ionic-hello-world
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls ionic-hello-world
  npm ERR! There is likely additional logging output above.</p>
  
  <p>npm ERR! Please include the following file with any support request:
  npm ERR!     C:\Users\user\Desktop\demoProj\npm-debug.log
  There was an error serving your Ionic application: There was an error with the s
  pawned command: serve</p>