chore(package): update jest to version 22.0.1

Closes #39

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "eslint-config-prettier": "^2.7.0",
     "eslint-plugin-prettier": "^2.3.1",
     "husky": "^0.14.3",
-    "jest": "^21.2.1",
+    "jest": "^22.0.1",
     "lint-staged": "^6.0.0",
     "prettier": "^1.8.1"
   },