Feat/add coc nvim support

[vinibispo]

Close #122

[vinibispo]

@pocco81 Could you please review it?

[joshmedeski]

I'm setting it in my init.lua file:

require('catppuccin').setup {
  transparent_background = true,
  integrations = {
    coc_nvim = true,
  }
}

Then, I get the following error when booting up:

Error detected while processing {path}/init.lu
a:
E5113: Error while calling lua chunk: .../init.lua:12: Vim
(lua):E5108: Error executing lua ...e/nvim/plugged/catppuccin/lua/catppuccin/core/mapper.lua:200: attempt
 to index a boolean value
stack traceback:
        ...e/nvim/plugged/catppuccin/lua/catppuccin/core/mapper.lua:200: in function 'get_integrations'
        ...e/nvim/plugged/catppuccin/lua/catppuccin/core/mapper.lua:224: in function 'apply'
        ...al/share/nvim/plugged/catppuccin/lua/catppuccin/main.lua:18: in function 'load'
        ...al/share/nvim/plugged/catppuccin/lua/catppuccin/main.lua:30: in function 'main'
        ...al/share/nvim/plugged/catppuccin/lua/catppuccin/init.lua:4: in function 'load'
        [string ":lua"]:1: in main chunk
        [C]: in function 'cmd'
        .../{path}init.lua:12: in main chunk
stack traceback:
        [C]: in function 'cmd'
Press ENTER or type command to continue

I checked out the PR before making this update, is there something I'm missing?

[vinibispo]

I'm gonna fix it, sorry

[vinibispo]

@joshmedeski Can you try again?

[joshmedeski]

It's working now, thanks!

[vinibispo]

Thank you for testing

[joshmedeski]

Thanks for the PR!

[pocco81]

Thank you so much @vinibispo for the PR and @joshmedeski for testing it before it's merged :)

[gitzhangzhao]

Everything else works fine, but I want diagnostic to show undercurl，how to do it?