This is a bug fix release of 3.3.1.
=== Changes
==== Ruby/GObjectIntrospection
Fixed
Fixed wrong nil check.
[GitHub#1270][Patch by moveccr]
Fixed a memory leak when module function is used with block.
[GitHub#1270][Reported by Izumi Tsutsui]
==== Ruby/GTK3
Improvements
Add backward compatibility APIs:
(({Gtk::Screen#add_style_provider}))
(({Gtk::Screen#remove_style_provider}))
(({Gtk::StyleContext.add_provider_for_screen}))
(({Gtk::StyleContext#add_provider}))
=== Thanks
moveccr
Izumi Tsutsui