title: Fix all node modules' version numbers to the currently using ones in package.json
body: <p>Currently, all node modules in package.json are using <code>*</code> as the version number, my application is quite stable with those node modules, so I want to fix their version numbers in package.json, so that I can run <code>npm install</code> in other places to install node modules with expected versions.</p>
  
  <p>Is there a way to do it quickly instead of changing them one by one manually?</p>
  
  <p>Such as some console commands, <code>npm fixversion module_a module_b ...</code>?</p>