Import devel/lua-language-server as lua-language-server version 3.6.9

The Lua Language Server is a comprehensive Lua development
server. It functions as an LSP client, supporting:

* Over 20 supported annotations for documenting your code
* Go to definition
* Dynamic type checking
* Find references
* Diagnostics/Warnings
* Syntax checking
* Element renaming
* Hover to view details on variables, functions, and more
* Autocompletion
* Support for libraries
* Code formatting
* Spell checking
* Custom plugins

(nikita)