Update package.json

Fixed syntax error - missing comma on line 30

package.json

@@ -27,7 +27,7 @@
         "ios",
         "mobile",
         "desktop",
-        "scrollbar"
+        "scrollbar",
         "touch"
     ],
     "homepage": "https://github.com/inuyaksa/jquery.nicescroll",
@@ -37,4 +37,4 @@
         "jquery.nicescroll.min.js",
         "zoomico.png"
     ]
-}
+}