Neovim syntax coloring using apple/sourcekit-lsp

lsp_swift.lua

local swift_lsp = vim.api.nvim_create_augroup("swift_lsp", { clear = true })
 vim.api.nvim_create_autocmd("FileType", {
  pattern = { "swift" },
  callback = function()
   local root_dir = vim.fs.dirname(vim.fs.find({
    "Package.swift",
    ".git",
   }, { upward = true })[1])
   local client = vim.lsp.start({
    name = "sourcekit-lsp",
    cmd = { "sourcekit-lsp" },
    root_dir = root_dir,
   })
   vim.lsp.buf_attach_client(0, client)
  end,
  group = swift_lsp,
 })