chore(demo): Updated to SUI 2.2.13

Author: edcarroll

demo/src/index.html

@@ -12,7 +12,7 @@
     <meta name="description" content="ng2-semantic-ui - Semantic UI Angular 2 Integrations">
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.11/semantic.min.css">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.13/semantic.min.css">
     <!-- Calendar Module CSS -->
     <link rel="stylesheet" href="https://unpkg.com/semantic-ui-calendar/dist/calendar.min.css">