Release for nvim_0.9

In case anyone stays with nvim 0.9.

Feature release and neovim 0.7

Features:

• Side bar
• lua snips
• neovim 0.7 API
• mock gen
• json to struct
• code lens
• code inlay
• coverage
• ...

Stable release before I messing up go test

There may be lots of updates and things may break for the coming commits.