chore(angular): target es5 by default

[jcesarmobile]

we get multiple issue reports about white screens and it's because angular targets es2020 by default, but both Capacitor and Ionic support iOS 13 and Chrome 60+, which won't be covered by es2020

This saves users from having to change it themselves as explained on https://ionicframework.com/docs/reference/browser-support#a-note-on-angular-13-support

[liamdebeasi]

Adding Sean as a reviewer.

We ship with Angular 14 which does not support iOS 13 (https://angular.io/guide/browser-support#browser-support). My only concern about this change is that it may imply that Angular 14 supports iOS 13. While it probably works for the most part, there may be certain features that do not work.