chore(package): update fbp-spec to version 0.5.0

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   },
   "devDependencies": {
     "chai": "^4.0.2",
-    "fbp-spec": "^0.4.1",
+    "fbp-spec": "^0.5.0",
     "mocha": "^4.0.0"
   }
 }