gnvim

New version and a brand new gnvim is here! Rewritten from the ground up
for gtk4, and now has:

• More complete and correct implementation of the ui api
• Custom rpc client
• Better code structure for easier development
• Updated UI
• Feature wise all the features are here.
• Rendering artefacts are now fixed, and the rendering performance should be
  better or at least on bar compared to the previous version.

A release before ext multigrid support lands.

Curated list of changes:

• A lot of bug fixes
• Added support for coc.nvim and LanguageClient-neovim completion icons
• Set WM_CLASS property to the gnvim window
• Support floating point font sizes

New things:

• Non-blinking cursor (ref #17). Also note that cursor blinking is now configured through guicursor (see :h guicursor and h gnvim-cursor-blinking).
• Visual indicator for modified buffers in tabs (ref #52)
• Hide completion item icons if all of them are unknown (ref #50

Also, there is now a gitter room for gnvim! Lets see if it gains any traction.