chore(package): update jest to version 22.1.2

Closes #979

Author: greenkeeper[bot]

package.json

@@ -74,7 +74,7 @@
     "flow-bin": "^0.61.0",
     "fs-extra": "^5.0.0",
     "husky": "^0.14.3",
-    "jest": "^21.2.1",
+    "jest": "^22.1.2",
     "json-schema": "0.2.3",
     "lint-staged": "^6.0.0",
     "mock-fs": "^4.4.1",