update spike-core

Author: jescalan

package.json

@@ -16,7 +16,7 @@
     "chalk": "^1.1.3",
     "inquirer": "^3.1.0",
     "lodash.reduce": "^4.6.0",
-    "spike-core": "^1.3.0",
+    "spike-core": "^1.3.1",
     "universal-analytics": "^0.4.13"
   },
   "devDependencies": {