build: Update required versions of GTK and libadwaita

We need development versions of these libraries for:

- CSS media queries
- `.document` CSS class

.gitlab-ci/test.yml

@@ -47,14 +47,13 @@ rust-tests:
 build-docs:
   extends:
     - .remove_build_only_modules
-    - .stable_runtime
   stage: test
+  image: 'quay.io/gnome_infrastructure/gnome-runtime-images:gnome-master'
   tags:
     - flatpak
   interruptible: true
-  before_script:
-    - !reference [.remove_build_only_modules, before_script]
-    - !reference [.stable_runtime, before_script]
+  variables:
+    FREEDESKTOP_RUNTIME_BRANCH: "25.08beta"
   script:
     - flatpak install --user --noninteractive org.freedesktop.Sdk.Extension.rust-nightly//${FREEDESKTOP_RUNTIME_BRANCH}
     # We want to use the nightly toolchain inside the build terminal.

meson.build

@@ -20,10 +20,10 @@ if pre_release_version != ''
 endif
 full_version = version
 
-dependency('glib-2.0', version: '>= 2.76') # update when changing gtk version
-dependency('gio-2.0', version: '>= 2.76') # always same version as glib
-dependency('gtk4', version: '>= 4.16')
-dependency('libadwaita-1', version: '>= 1.7')
+dependency('glib-2.0', version: '>= 2.82') # update when changing gtk version
+dependency('gio-2.0', version: '>= 2.82') # always same version as glib
+dependency('gtk4', version: '>= 4.19.3')
+dependency('libadwaita-1', version: '>= 1.8.beta')
 
 # Please keep these dependencies sorted.
 dependency('gstreamer-1.0', version: '>= 1.20')