Vaadin 22: Safari 13 should be detected as too old

[darmro]

Description of the bug

Open https://start.vaadin.com/app on Safari 13.
The app will appear, but doesn't work properly (there is a lot of js errors on the browser console):

Expected behavior

Safari 13 should be checked to be too old in Vaadin "browser to old" handler.

Minimal reproducible example

Just open https://start.vaadin.com/app on Safari 13.

Versions

• Vaadin / Flow version: 22.0.8
• OS version: macOS
• Browser version (if applicable): Safari 13

[joheriks]

EventTarget() constructor (use by @vaadin/components-base) is supported from Safari 14. Increasing minimum version to 14+.