chore(package): update jest to version 22.1.4

Closes #40

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "eslint-plugin-react": "7.4.0",
     "husky": "0.14.3",
     "identity-obj-proxy": "3.0.0",
-    "jest": "21.2.1",
+    "jest": "22.1.4",
     "lint-staged": "4.3.0",
     "npm-run-all": "4.1.1",
     "prettier": "1.7.4",