Log Message:
py-urwid: update to 2.6.4.

2.6.4

Bug fixes 🕷

    Fix regression from 2.6.1: ListBox used for tree implementation. by \ 
@penguinolog in #829

2.6.3

Bug fixes 🕷

    Fix regression from 2.6.2: weight can be float by @penguinolog in #827

2.6.2

New features 🗹

    Feature: support Widget instance as Frame focus part in constructor by \ 
@penguinolog in #820
    Feature: EventLoop.run_in_executor should accept **kwargs by @penguinolog in #822
    Feature: extend validation for Columns and Pile by @penguinolog in #825

Bug fixes 🕷

    Fix: nonstandard display typing issues by @penguinolog in #818
    Fix: Text pack for layout without pack by @penguinolog in #819
    Fix: ListBox render crash if empty elements in tail by @penguinolog in #824