title: Difference between this.$parent.$emit and this.$emit
body: <p>When we need a custom component to emit an event in <a href="https://github.com/ratiw/vuetable-2" rel="noreferrer">VueTable2</a>, we must use:</p>
  
  <pre><code>this.$parent.$emit('myCustomEvent')
  
  // instead of
  this.$emit('myCustomEvent')
  </code></pre>
  
  <p><a href="https://github.com/ratiw/vuetable-2/issues/21#issuecomment-262014205" rel="noreferrer">This thread</a> tells us more about this aspect.</p>
  
  <p>I used to run <code>this.$emit()</code> when I had to trigger an event. I was wondering what are the main differences between the two of them?</p>