title: How to have superscript in column header of this BootstrapVue table?
body: <p>I have a bootstrapvue table that looks like this;</p>
  <p><a href="https://i.stack.imgur.com/TrNrx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TrNrx.png" alt="enter image description here" /></a></p>
  <p>Here's the code;</p>
  
    
      
    
  
  <pre><code>&lt;script&gt;
    export default {
      data() {
        return {
          // Note 'isActive' is left out and will not appear in the rendered table
          fields: [
            {
              key: 'last_name',
              sortable: true
            },
            {
              key: 'first_name',
              sortable: false
            },
            {
              key: 'age',
              label: 'Person age',
              sortable: true,
              // Variant applies to the whole column, including the header and footer
              variant: 'danger'
            }
          ],
          items: [
            { isActive: true, age: 40, first_name: 'Dickerson', last_name: 'Macdonald' },
            { isActive: false, age: 21, first_name: 'Larsen', last_name: 'Shaw' },
            { isActive: false, age: 89, first_name: 'Geneva', last_name: 'Wilson' },
            { isActive: true, age: 38, first_name: 'Jami', last_name: 'Carney' }
          ]
        }
      }
    }
  &lt;/script&gt;
  </code></pre>
  <p>I want to change the 3rd column header <code>Person age</code> to have a superscript such that it becomes <code>Person age<sup>1</sup></code></p>
  <p>Unfortunately, this is not as easy as using HTML inside the label for the 3rd column header.</p>
  <p>I am using vue v2.6 and BootstrapVue.</p>