[gtksourceview] tests: fix <requires/> elements for GtkBuilder

[Christian Hergert <chergert src gnome org>]

commit 585f48cead666a68d4cdb83f4fb896d522320488
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 28 15:42:51 2022 -0800

    tests: fix <requires/> elements for GtkBuilder

 tests/test-widget.ui | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/test-widget.ui b/tests/test-widget.ui
index 1185a465..181726d7 100644
--- a/tests/test-widget.ui
+++ b/tests/test-widget.ui
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="3.98"/>
-  <requires lib="gtksourceview" version="5.0"/>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="GtkSource" version="5.0"/>
   <object class="GtkAdjustment" id="adjustment_indent_width">
     <property name="lower">1</property>
     <property name="upper">16</property>