fix(build): add missing comma in footer

Gruntfile.js

@@ -11,7 +11,7 @@ module.exports = function (grunt) {
       options: {
         sourceMap: true,
         banner: ';/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n(function(){\n',
-        footer: '}).call(this)'
+        footer: '}).call(this);'
       },
       dist: {
         src:  [

dist/showdown.js

@@ -1,4 +1,4 @@
-;/*! showdown 27-05-2015 */
+;/*! showdown 28-05-2015 */
 (function(){
 /**
  * Created by Tivie on 06-01-2015.
@@ -1684,5 +1684,5 @@ if (typeof module !== 'undefined' && module.exports) {
 } else {
   root.showdown = showdown;
 }
-}).call(this)
+}).call(this);
 //# sourceMappingURL=showdown.js.map