Conflicting with emojis

[seahindeniz]

If header contains emoji, plugin doesn't work as expected

Expected result

<ul>
  <li>
    <a href="#h1-heading-8-)">h1 Heading 8-)</a>
  </li>
</ul>

<h1 id="h1-heading-8-)">h1 Heading <img class="emoji" draggable="false" alt="😎" src="https://twemoji.maxcdn.com/2/72x72/1f60e.png"></h1>

OR

Expected result

<ul>
  <li>
    <a href="#h1-heading">h1 Heading 8-)</a>
  </li>
</ul>

<h1 id="h1-heading">h1 Heading <img class="emoji" draggable="false" alt="😎" src="https://twemoji.maxcdn.com/2/72x72/1f60e.png"></h1>

Actual result

<ul>
  <li>
    <a href="#h1-heading-8-)">h1 Heading 8-)</a>
  </li>
</ul>

<h1 id="h1-heading">h1 Heading <img class="emoji" draggable="false" alt="😎" src="https://twemoji.maxcdn.com/2/72x72/1f60e.png"></h1>

[trolologuy]

Same issue with font awesome.
Here's the markdown:
## <font-awesome-icon icon="language"/> Spoken Languages
Results in this link:
#font-awesome-icon-icon-language-spoken-languages
Which is non-valid.
Everything between < >should probably be ignored.

[martinlissmyr]

Closing as noone seems to want to do a fix for it. If you create a with PR with the necessary fixes I'd accept it.