Upgraded to core js v3

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 3.0.0
+
+- Upgraded to core js 3
+
+🚨 @babel/polyfill has been deprecated in favor of directly including core-js/stable (to polyfill ECMAScript features)
+and regenerator-runtime/runtime (needed to use transpiled generator functions). These should be installed at the project level.
+
+```js
+import "core-js/stable";
+import "regenerator-runtime/runtime";
+```
+
 ## 2.0.6
 
 - Fixed issue with 'Duplicate declaration' babel error with nested async functions when running tests

packages/babel-preset-app/index.js

@@ -25,11 +25,11 @@ module.exports = function() {
 				{
 					// Lets not transform modules to commons js
 					modules: false,
-					// replaces the statement import "@babel/polyfill" or require("@babel/polyfill")
-					// with individual requires for @babel/polyfill based on browser environment.
+					// replaces the statement import "core-js" or require("core-js")
+					// with individual requires for core-js based on browser environment.
 					useBuiltIns: 'usage',
 					// Set the corejs version we are using to avoid warnings in console
-					corejs: 2,
+					corejs: 3,
 				},
 			],
 		].filter(Boolean),