undo jest version change

Author: eli-darkly

package.json

@@ -53,7 +53,7 @@
     "eslint-plugin-babel": "5.0.0",
     "eslint-plugin-prettier": "2.6.0",
     "eventsourcemock": "1.1.0",
-    "jest": "23.5.0",
+    "jest": "22.4.3",
     "jest-junit": "3.6.0",
     "jest-localstorage-mock": "2.2.0",
     "jsdom": "11.11.0",