Merge pull request #184 from mansiagarwal451/update_lobby

Updated gitter link for lobby.

Author: abhishek97

views/layouts/main.hbs

@@ -174,7 +174,7 @@
       <i class="github icon"></i>
       Open Issues
     </a>
-    <a class="item" href="https://gitter.im/coding-blocks/boss-2018-lobby" target="_blank" >
+    <a class="item" href="https://gitter.im/coding-blocks/boss-2019-lobby" target="_blank" >
       <i class="gitter icon"></i> Gitter
     </a>
   </div>