https://www.vim.org/vim-8.2-released.php
两项主要新功能 popup windows and text properties
runtime/doc/version8.txt 的 8.2 相关
VERSION 8.2 *version-8.2* *version8.2* *vim-8.2*
This section is about improvements made between version 8.1 and 8.2.
This release has hundreds of bug fixes, there are several new features and
there are many minor improvements.
Popup windows *new-popup-window*