title: Validate Given MS Argument
body: <p>I want to know a way to check if a given string in <code>ms()</code> is correctly formatted and not an invalid time.</p>
  <pre><code>const ms = require('ms')
  const str = 'abc'
  
  setTimeout(function(){
  
     //Do something
  
  }, ms(str))
  </code></pre>
  <p>The goal is to detect an whether <code>str</code> is valid or invalid MS time before the function timeout starts.</p>