feat: describe breaking changes

BREAKING CHANGE:

- Upgraded to Svelte 4 providing improved TypeScript types.
- Dropped re-exporting types and utility functions from `immutable-json-patch`
  and `svelte`. Instead, import them directly from the library itself.
- Dropped deprecated types `FontAwesomeIcon` (use `IconDefinition` instead),
  `DropdownButtonItem`, `MenuButtonItem`, `MenuSeparatorItem`, `MenuSpaceItem`,
  and typeguard `isMenuSpaceItem`.
- The `vanilla-package` does not embed types of dependencies anymore and instead,
  imports the dependencies and use the types from there.
- Drop official support for Node.js 16

README.md

@@ -633,7 +633,7 @@ Publish to npm (will increase version number and publish to npm):
 npm run release
 ```
 
-Note that it will publish two npm packages: `svelte-jsoneditor` and `vanilla-jsoneditor`. You'll need to enter an npm one-time password twice.
+Note that it will publish two npm packages: `svelte-jsoneditor` and `vanilla-jsoneditor`. You'll need to enter a one-time password for npm.
 
 To try a build and see the change list, run: