jest: upgrade to 24.0.0-alpha.4

Summary: Upgrade Jest to 24.0.0-alpha.4

Reviewed By: mjesun

Differential Revision: D12822581

fbshipit-source-id: 6e547ffbd2c3c4f93b8aa540d22dd666582d3f1e

Author: rubennorte

package.json

@@ -186,7 +186,7 @@
     "opn": "^3.0.2",
     "optimist": "^0.6.1",
     "plist": "^3.0.0",
-    "pretty-format": "^23.4.1",
+    "pretty-format": "24.0.0-alpha.4",
     "promise": "^7.1.1",
     "prop-types": "^15.5.8",
     "react-clone-referenced-element": "^1.0.1",
@@ -218,7 +218,7 @@
     "eslint-plugin-react": "7.8.2",
     "eslint-plugin-react-native": "3.5.0",
     "flow-bin": "^0.84.0",
-    "jest": "24.0.0-alpha.2",
+    "jest": "24.0.0-alpha.4",
     "jest-junit": "5.1.0",
     "prettier": "1.13.6",
     "react": "16.6.0-alpha.8af6728",