Update jest monorepo to v23

Author: renovate-bot

package.json

@@ -16,7 +16,7 @@
   "devDependencies": {
     "babel-core": "^6.26.0",
     "babel-eslint": "^10.0.0",
-    "babel-jest": "^20.0.3",
+    "babel-jest": "^23.0.0",
     "babel-loader": "^7.1.2",
     "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-object-rest-spread": "^6.23.0",
@@ -30,7 +30,7 @@
     "eslint": "^5.0.0",
     "gh-pages": "^2.0.0",
     "html-webpack-plugin": "^2.30.1",
-    "jest": "^20.0.4",
+    "jest": "^23.0.0",
     "js-yaml": "^3.9.1",
     "react-test-renderer": "^16.0.0",
     "standard": "^11.0.0",