feat(phpactor): do not use lspconfig.util

Author: TheRealLorenz

lsp/phpactor.lua

@@ -4,15 +4,12 @@
 ---
 --- Installation: https://phpactor.readthedocs.io/en/master/usage/standalone.html#global-installation
 
-local util = require 'lspconfig.util'
-
 return {
   cmd = { 'phpactor', 'language-server' },
   filetypes = { 'php' },
   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', '.phpactor.json', '.phpactor.yml')(fname)
+    local root = vim.fs.root(bufnr, { 'composer.json', '.git', '.phpactor.json', '.phpactor.yml' }) or cwd
 
     -- prefer cwd if root is a descendant
     on_dir(vim.fs.relpath(cwd, root) and cwd or root)