This prevents the topbar images and Roboto fonts from being bundled when they're not needed, e.g.:
```
...
./data/flutter_assets/packages/yaru/assets/fonts/Ubuntu-B.ttf
./data/flutter_assets/packages/golden_screenshot/
./data/flutter_assets/packages/golden_screenshot/assets/
./data/flutter_assets/packages/golden_screenshot/assets/topbars/
./data/flutter_assets/packages/golden_screenshot/assets/topbars/newer_ipad_topbar.png
./data/flutter_assets/packages/golden_screenshot/assets/topbars/newer_iphone_topbar.png
./data/flutter_assets/packages/golden_screenshot/assets/topbars/older_iphone_topbar.png
./data/flutter_assets/packages/golden_screenshot/assets/topbars/older_ipad_topbar.png
./data/flutter_assets/packages/golden_screenshot/assets/topbars/android_topbar.png
./data/flutter_assets/packages/golden_screenshot/assets/roboto/
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-BlackItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-ThinItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-ExtraBoldItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Black.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-ExtraLightItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Italic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-ExtraBold.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Bold.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Light.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-LightItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Regular.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Thin.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-MediumItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-BoldItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-Medium.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-SemiBold.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-SemiBoldItalic.ttf
./data/flutter_assets/packages/golden_screenshot/assets/roboto/Roboto-ExtraLight.ttf
./data/flutter_assets/fonts/
./data/flutter_assets/fonts/MaterialIcons-Regular.otf
...
```

Error: The plugin "workmanager_apple" requires a higher minimum iOS deployment version than your application is targeting.
To build, increase your application's deployment target to at least 13.0 as described at https://flutter.dev/to/ios-deploy

The snap is still included in the install instructions

The separation isn't needed anymore since we ditched the simulator package

ahann@fedora:~/Documents/GitHub/saber$ flatpak run --command=flatpak-builder-lint org.flatpak.Builder appstream flatpak/com.adilhanney.saber.metainfo.xml
I: com.adilhanney.saber:56: description-first-para-too-short
     Saber is the notes app built for handwriting.
   The first `description/p` paragraph of this component might be too short (< 80 characters).
   Please consider starting with a longer paragraph to improve how the description looks like in
   software centers and to provide more detailed information on this component immediately in the
   first paragraph.

W: com.adilhanney.saber:265: description-spurious-text
   The description element contains raw text that is not in any paragraph or other permitted tag.
   This is not allowed and the additional text may be ignored by parsers or raise errors.

W: com.adilhanney.saber:262: description-no-valid-content
   The description element does not contain any valid content (paragraphs, enumerations, etc.).

✘ Validation failed: warnings: 2, infos: 1

https://github.com/espresso3389/pdfrx/tree/master/packages/pdfrx#note-for-building-release-builds