Fix MySQL syntax highlighting.

The MySQL syntax highlighting does not currently work unless you explicitly define the correct MIME type associated with it (`text/x-mysql`).

.all-contributorsrc

@@ -165,6 +165,16 @@
         "bug",
         "code"
       ]
+    },
+    {
+      "login": "varbrad",
+      "name": "Brad Davies",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/11805775?v=4",
+      "profile": "https://bradlab.co.uk",
+      "contributions": [
+        "bug",
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -67,5 +67,5 @@ Thanks goes out to all these wonderful people ([emoji key](https://github.com/ke
 | [<img src="https://avatars0.githubusercontent.com/u/10078572?v=4" width="100px;"/><br /><sub>briandennis</sub>](https://github.com/briandennis)<br />[💻](https://github.com/dawnlabs/carbon/commits?author=briandennis "Code") [📖](https://github.com/dawnlabs/carbon/commits?author=briandennis "Documentation") [🚇](#infra-briandennis "Infrastructure (Hosting, Build-Tools, etc)") [👀](#review-briandennis "Reviewed Pull Requests") | [<img src="https://avatars0.githubusercontent.com/u/8397708?v=4" width="100px;"/><br /><sub>mfix22</sub>](https://github.com/mfix22)<br />[💬](#question-mfix22 "Answering Questions") [💻](https://github.com/dawnlabs/carbon/commits?author=mfix22 "Code") [🤔](#ideas-mfix22 "Ideas, Planning, & Feedback") | [<img src="https://avatars1.githubusercontent.com/u/10369094?v=4" width="100px;"/><br /><sub>jakedex</sub>](https://github.com/jakedex)<br />[💬](#question-jakedex "Answering Questions") [💻](https://github.com/dawnlabs/carbon/commits?author=jakedex "Code") [🎨](#design-jakedex "Design") [📹](#video-jakedex "Videos") | [<img src="https://avatars1.githubusercontent.com/u/10191084?v=4" width="100px;"/><br /><sub>andrewda</sub>](https://github.com/andrewda)<br />[💬](#question-andrewda "Answering Questions") [💻](https://github.com/dawnlabs/carbon/commits?author=andrewda "Code") [🐛](https://github.com/dawnlabs/carbon/issues?q=author%3Aandrewda "Bug reports") [👀](#review-andrewda "Reviewed Pull Requests") | [<img src="https://avatars2.githubusercontent.com/u/14703164?v=4" width="100px;"/><br /><sub>yeskunall</sub>](https://github.com/yeskunall)<br />[💻](https://github.com/dawnlabs/carbon/commits?author=yeskunall "Code") [📖](https://github.com/dawnlabs/carbon/commits?author=yeskunall "Documentation") [🔧](#tool-yeskunall "Tools") [🐛](https://github.com/dawnlabs/carbon/issues?q=author%3Ayeskunall "Bug reports") | [<img src="https://avatars1.githubusercontent.com/u/2652676?v=4" width="100px;"/><br /><sub>stoshfabricius</sub>](https://github.com/stoshfabricius)<br />[💻](https://github.com/dawnlabs/carbon/commits?author=stoshfabricius "Code") | [<img src="https://avatars1.githubusercontent.com/u/11639896?v=4" width="100px;"/><br /><sub>jkling38</sub>](https://github.com/jkling38)<br />[📖](https://github.com/dawnlabs/carbon/commits?author=jkling38 "Documentation") |
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-| [<img src="https://avatars1.githubusercontent.com/u/10941033?v=4" width="100px;"/><br /><sub>g3r4n</sub>](https://github.com/g3r4n)<br />[💻](https://github.com/dawnlabs/carbon/commits?author=g3r4n "Code") | [<img src="https://avatars0.githubusercontent.com/u/55830?v=4" width="100px;"/><br /><sub>Mat Gadd</sub>](http://drarok.com/)<br />[🐛](https://github.com/dawnlabs/carbon/issues?q=author%3ADrarok "Bug reports") [💻](https://github.com/dawnlabs/carbon/commits?author=Drarok "Code") |
+| [<img src="https://avatars1.githubusercontent.com/u/10941033?v=4" width="100px;"/><br /><sub>g3r4n</sub>](https://github.com/g3r4n)<br />[💻](https://github.com/dawnlabs/carbon/commits?author=g3r4n "Code") | [<img src="https://avatars0.githubusercontent.com/u/55830?v=4" width="100px;"/><br /><sub>Mat Gadd</sub>](http://drarok.com/)<br />[🐛](https://github.com/dawnlabs/carbon/issues?q=author%3ADrarok "Bug reports") [💻](https://github.com/dawnlabs/carbon/commits?author=Drarok "Code") | [<img src="https://avatars1.githubusercontent.com/u/11805775?v=4" width="100px;"/><br /><sub>Brad Davies</sub>](https://bradlab.co.uk)<br />[🐛](https://github.com/dawnlabs/carbon/issues?q=author%3Avarbrad "Bug reports") [💻](https://github.com/dawnlabs/carbon/commits?author=varbrad "Code") |
 <!-- ALL-CONTRIBUTORS-LIST:END -->

lib/constants.js

@@ -294,6 +294,12 @@ export const LANGUAGES = [
     name: 'SQL',
     mode: 'sql'
   },
+  {
+    name: 'SQL (MySQL)',
+    mode: 'sql',
+    mime: 'text/x-mysql',
+    short: 'mysql'
+  },
   {
     name: 'Swift',
     mode: 'swift'