build: Bump pulseaudio dependency

We need 12.99.3 in order to avoid deadlocks on Xwayland startup

Closes: gnome-shell#2599

meson.build

@@ -55,7 +55,7 @@ libgvc_no_gir_sources = [
 libgvc_deps = [
   dependency('gio-2.0'),
   dependency('gobject-2.0'),
-  dependency('libpulse', version: '>= 2.0'),
+  dependency('libpulse', version: '>= 12.99.3'),
   dependency('libpulse-mainloop-glib')
 ]