Fixes the ios_fullscreen add-to-app sample app:
1. The Flutter module was renamed from `flutter_module` to
`flutter_module_fullscreen`. However, the iOS native app had not been
updated to reflect this
2. Flutter's minimum deployment version was raised to 13.0. The iOS
native app targeted iOS 12.4.
## Pre-launch Checklist
- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [ ] I have added sample code updates to the [changelog].
- [x] I updated/added relevant documentation (doc comments with `///`).
If you need help, consider asking for advice on the #hackers-devrel
channel on [Discord].
<!-- Links -->
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md
[CLA]: https://cla.developers.google.com/
[Discord]:
https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md
[Contributors Guide]:
https://github.com/flutter/samples/blob/main/CONTRIBUTING.md
[changelog]: ../CHANGELOG.md
Co-authored-by: Eric Windmill <eric@ericwindmill.com>
Loïc Sharma
gaaclarke