chore(package): update fbp-spec to version 0.6.6

Closes #26

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "fbp-spec": "^0.5.2",
+    "fbp-spec": "^0.6.6",
     "grunt": "^1.0.1",
     "grunt-cli": "^1.2.0",
     "grunt-exec": "^3.0.0",