title: NPM -v not showing version in package.json
body: <p>I wish to run <code>npm audit</code> and <code>npm audit fix</code></p>
  
  <p>In my package.json npm is version 6.4.1</p>
  
  <p><code>"npm": "^6.4.1",</code></p>
  
  <p>But when I run <code>npm -v</code> in the project directory it shows 5.6.0</p>
  
  <p>When I run <code>npm install npm@latest -g</code> it shows npm@6.4.1</p>
  
  <p>The when I run <code>npm -v</code> in the project directory it shows 5.6.0</p>
  
  <p>What could be the cause of this?</p>