Upgraded to jest 25.2.0. (#6849)

babel.config.js

@@ -10,6 +10,7 @@ module.exports = {
         },
         useBuiltIns: 'entry',
         corejs: { version: 3, proposals: false },
+        exclude: ['transform-regenerator'],
       },
     ],
     'preact',

package.json

@@ -95,7 +95,7 @@
     "faker": "^4.1.0",
     "husky": "^4.2.3",
     "ibm-openapi-validator": "0.26.0",
-    "jest": "^23.5.0",
+    "jest": "25.2.0",
     "jest-axe": "^3.4.0",
     "jest-fetch-mock": "^3.0.3",
     "jsdom": "^16.2.1",