Update dependency jest to v30

Author: renovate[bot]

package.json

@@ -44,7 +44,7 @@
     "eslint": "5.8.0",
     "eslint-config-metalab": "10.0.0",
     "flow-bin": "0.84.0",
-    "jest": "23.6.0",
+    "jest": "30.0.5",
     "ncp": "2.0.0",
     "prettier": "1.14.3",
     "react": "16.6.0",