chore(package): update jest to version 22.0.1

Closes #8

Author: greenkeeper[bot]

package.json

@@ -16,7 +16,7 @@
     "babel-jest": "^21.2.0",
     "babel-preset-env": "^1.6.1",
     "eslint": "^4.11.0",
-    "jest": "^21.2.1",
+    "jest": "^22.0.1",
     "prettier": "^1.8.2"
   },
   "peerDependencies": {