chore(package): update jest to version 18.1.0 (#19)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "babel-plugin-transform-react-jsx": "^6.1.18",
     "babel-preset-es2015": "^6.1.18",
     "babelify": "^7.2.0",
-    "jest": "^17.0.3",
+    "jest": "^18.1.0",
     "jest-cli": "^17.0.3",
     "lodash": "^4.0.0",
     "react-addons-test-utils": "^15.2.0",