chore(package): update jest to version 18.1.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "eslint": "^3.12.0",
     "eslint-config-airbnb-base": "^11.0.0",
     "eslint-plugin-import": "^2.2.0",
-    "jest": "^17.0.1",
+    "jest": "^18.1.0",
     "rimraf": "^2.5.2",
     "to-ast": "^1.0.0"
   },