Require gobject-introspection 1.34.0

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=75384

configure.ac

diff --git a/configure.ac b/configure.ac
index 0d4bec4..ba69b69 100644
--- a/configure.ac
+++ b/configure.ac
@@ -181,7 +181,7 @@
 have_introspection=false
 m4_ifdef([GOBJECT_INTROSPECTION_CHECK], [
 	if $have_gobject; then
-		GOBJECT_INTROSPECTION_CHECK([1.32.0])
+		GOBJECT_INTROSPECTION_CHECK([1.34.0])
 		if test "x$found_introspection" = xyes; then
 			have_introspection=true
 		fi