title: Difference between PropTypes.exact and PropTypes.shape
body: <p>What's the difference between</p>
  
  <pre><code>PropTypes.exact({
    name: PropTypes.string,
    age: PropTypes.number
  })
  </code></pre>
  
  <p>vs</p>
  
  <pre><code>PropTypes.shape({
    name: PropTypes.string,
    age: PropTypes.number
  })
  </code></pre>
  
  <p>I will be glad of any help</p>