Updating Lua API Docs

Clone the neovim repo somewhere on your system
Run ./scripts/gen_vimdoc.py
Copy neovim/runtime/doc/*.mpack files to the neodev.nvim data directory
Open the file neodev.nvim/lua/build/api.lua in Neovim
Execute :luafile %
You'll see a lot of annotations that might be changed due to your local system setup, so you can ignore those
Check if the changes you intended are present
Create a PR with your code changes, and without the new EmmyLua annotations