Upgrading Casper to 2.1.9

package.json

@@ -2,7 +2,7 @@
     "name": "casper",
     "description": "The default personal blogging theme for Ghost. Beautiful, minimal and responsive.",
     "demo": "https://demo.ghost.io",
-    "version": "2.1.8",
+    "version": "2.1.9",
     "engines": {
         "ghost": ">=1.2.0"
     },