build: Bump GLib dependency to 2.38
This is needed for the G_DEFINE_TYPE_WITH_PRIVATE usage from the previous commit.
Signed-off-by: Philip Withnall withnall@endlessm.com
This is needed for the G_DEFINE_TYPE_WITH_PRIVATE usage from the previous commit.
Signed-off-by: Philip Withnall withnall@endlessm.com