feat: added twitter pixel

Author: lmammino

views/_layout.pug

@@ -217,3 +217,9 @@ html(lang=meta.lang prefix="og: http://ogp.me/ns#")
   block js
     - var jsFile = isProduction ? `main__${process.env['npm_package_version']}.bundle.min.js` : 'main.bundle.js';
     script(src=`js/${jsFile}`)
+    script.
+      !function(e,t,n,s,u,a){e.twq||(s=e.twq=function(){s.exe?s.exe.apply(s,arguments):s.queue.push(arguments);
+      },s.version='1.1',s.queue=[],u=t.createElement(n),u.async=!0,u.src='https://static.ads-twitter.com/uwt.js',
+      a=t.getElementsByTagName(n)[0],a.parentNode.insertBefore(u,a))}(window,document,'script');
+      twq('config','okohn');
+