3.31.4 - 2019-03-07
-------------------

* docs: document GObject.Object.weak_ref() :issue:`245`
* cairo: Add cairo pattern foreign struct support :mr:`111` (:user:`Renato Florentino Garcia <renato_garcia>`)
* cairo: Add cairo_matrix_t converter to GValue :mr:`112` (:user:`Renato Florentino Garcia <renato_garcia>`)