[gnome-builder/wip/gtk4-port] build: bump GtkSourceView requirement

[Christian Hergert <chergert src gnome org>]

commit 5d4849fcbe2ea24370fda3b6d185db6575d56b78
Author: Christian Hergert <chergert redhat com>
Date:   Sun Apr 3 10:44:37 2022 -0700

    build: bump GtkSourceView requirement
    
    We need this for new API landing in GtkSourceView for snippets.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index de02f5946..b996d62e1 100644
--- a/meson.build
+++ b/meson.build
@@ -24,7 +24,7 @@ pkgtypelibdir = join_paths(get_option('libdir'), 'gnome-builder', 'girepository-
 # Check dependencies
 glib_req_version = '2.70.0'
 gtk_req_version = '4.6'
-gtksourceview_req_version = '5.4'
+gtksourceview_req_version = '5.5'
 
 glib_req = '>= @0@'.format(glib_req_version)
 gtk_req = '>= @0@'.format(gtk_req_version)