title: Vue Cli: Cannot find module '../package.json' error after npm install
body: <p>I am not an expert in Vuejs or Vuecli, but I do manage to get stuff working.
  I had a project i worked on before using Vuecli3 and webpack and now when I opened it after few weeks to make changes, i get the below error in dev mode</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>$ vue-cli-service serve --open --mode development --dashboard
  internal/modules/cjs/loader.js:582
      throw err;
      ^
  
  Error: Cannot find module '../package.json'
      at Function.Module._resolveFilename (internal/modules/cjs/loader.js:580:15)
      at Function.Module._load (internal/modules/cjs/loader.js:506:25)
      at Module.require (internal/modules/cjs/loader.js:636:17)
      at require (internal/modules/cjs/helpers.js:20:18)
      at Object.&lt;anonymous&gt; (/Volumes/Drobo/Dropbox/NASDAQ Dubai/Marketdata-6-Indices/node_modules/.bin/vue-cli-service:5:25)
      at Module._compile (internal/modules/cjs/loader.js:688:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
      at Module.load (internal/modules/cjs/loader.js:598:32)
      at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
      at Function.Module._load (internal/modules/cjs/loader.js:529:3)</code></pre>
  </div>
  </div>
  </p>
  
  <p>Total task duration: 0.15s</p>
  
  <p>The package.json file is right there in the root director and also the .lock file. Dont know what is the reason for this error in compiling. </p>
  
  <p>Any help hightly appreciated</p>