message: docs(migration): add browserslist step
diff: @@ -67,6 +67,20 @@ npm install @ionic/core@next
  ## Updating Your Code
  +### Browser Support
  +
  +The list of browsers that Ionic supports has changed. Review the [Browser Support Guide](../reference/browser-support) to ensure you are deploying apps to supported browsers.
  +
  +If you have a `browserslist` or `.browserslistrc` file, update it with the following content:
  +
  +```
  +Chrome >=79
  +Firefox >=70
  +Edge >=79
  +Safari >=14
  +iOS >=14
  +```
  +
  ### Types
  1. `ActionSheetAttributes`, `AlertAttributes`, `AlertTextareaAttributes`, `AlertInputAttributes`, `LoadingAttributes`, `ModalAttributes`, `PickerAttributes`, `PopoverAttributes`, and `ToastAttributes` have been removed. Developers should use `{ [key: string]: any }` instead.
  