Update Flatpak (#23)

* Flatpak: Drop sandbox hole for prerfers-color-scheme

* Flatpak: Update to GtkSourceView 4.8.0

* Update GtkSourceView

com.github.manexim.typewriter.yml

@@ -7,18 +7,13 @@ finish-args:
   - '--share=ipc'
   - '--socket=fallback-x11'
   - '--socket=wayland'
-
-  # needed for perfers-color-scheme
-  - '--system-talk-name=org.freedesktop.Accounts'
 modules:
   - name: gtksourceview
-    buildsystem: autotools
-    config-opts:
-      - '--enable-gtk-doc=no'
+    buildsystem: meson
     sources:
-      - type: archive
-        url: https://download.gnome.org/sources/gtksourceview/3.24/gtksourceview-3.24.11.tar.xz
-        sha256: 691b074a37b2a307f7f48edc5b8c7afa7301709be56378ccf9cc9735909077fd
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/gtksourceview.git
+        tag: '4.8.0'
 
   - name: typewriter
     buildsystem: meson

meson.build

@@ -8,7 +8,7 @@ add_global_arguments('-DGETTEXT_PACKAGE="@0@"'.format (meson.project_name()), la
 
 gtk_plus_3_dep = dependency('gtk+-3.0')
 granite_dep = dependency('granite')
-gtksourceview_dep = dependency('gtksourceview-3.0')
+gtksourceview_dep = dependency('gtksourceview-4')
 libhandy_dep = dependency('libhandy-1', version: '>=1.0.0')
 
 dependencies = [