feat(smarty_ls): do no use lspconfig.util

Author: TheRealLorenz

lsp/smarty_ls.lua

@@ -10,15 +10,12 @@
 --- npm i -g vscode-smarty-langserver-extracted
 --- ```
 
-local util = require 'lspconfig.util'
-
 return {
   cmd = { 'smarty-language-server', '--stdio' },
   filetypes = { 'smarty' },
   root_dir = function(bufnr, on_dir)
-    local fname = vim.api.nvim_buf_get_name(bufnr)
     local cwd = assert(vim.uv.cwd())
-    local root = util.root_pattern('composer.json', '.git')(fname)
+    local root = vim.fs.root(bufnr, { 'composer.json', '.git' }) or cwd
 
     -- prefer cwd if root is a descendant
     on_dir(vim.fs.relpath(cwd, root) and cwd or root)