[almanah/wip/jtojnar/gtksourceview-4] build: Switch to GtkSourceView 4

[Jan Tojnar <jtojnar src gnome org>]

commit 0ba7f05cba7feaf2ae2c220596aead5dfc676675
Author: Jan Tojnar <jtojnar gmail com>
Date:   Mon Aug 15 13:36:44 2022 +0200

    build: Switch to GtkSourceView 4
    
    No API changes that affect us, other than the need to call init/finalize:
    
    https://gnome.pages.gitlab.gnome.org/gtksourceview/gtksourceview5/porting-guide-3-to-4.html

 meson.build | 2 +-
 src/main.c  | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 813e67b..9c4f155 100644
--- a/meson.build
+++ b/meson.build
@@ -31,7 +31,7 @@ gtk = dependency('gtk+-3.0', version: '>= 3.15')
 gmodule = dependency('gmodule-2.0')
 gthread = dependency('gthread-2.0')
 gio = dependency('gio-2.0', version: '>= 2.32')
-gtksourceview = dependency('gtksourceview-3.0')
+gtksourceview = dependency('gtksourceview-4')
 sqlite = dependency('sqlite3')
 cairo = dependency('cairo')
 atk = dependency('atk')
diff --git a/src/main.c b/src/main.c
index c7065e0..eb07a0c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -33,9 +33,13 @@ main (int argc, char *argv[])
        g_thread_init (NULL);
 #endif
 
+       gtk_source_init ();
+
        application = almanah_application_new ();
        status = g_application_run (G_APPLICATION (application), argc, argv);
        g_object_unref (application);
 
+       gtk_source_finalize ();
+
        return status;
 }