[fix] fix koka language server

lua/lspconfig/server_configurations/koka.lua

@@ -1,36 +1,23 @@
 local util = require 'lspconfig.util'
 
-local root_files = {}
-
-local default_capabilities = {
- textDocument = {
- completion = {
- editsNearCursor = true,
- },
- },
- offsetEncoding = { 'utf-8' },
-}
-
 return {
  default_config = {
- cmd = { 'koka', '--language-server' },
+ cmd = { 'koka', '--language-server', '--lsstdio' },
  filetypes = { 'kk' },
+ single_file_support = true,
  root_dir = function(fname)
- return util.root_pattern(unpack(root_files))(fname) or util.find_git_ancestor(fname)
+ return util.find_git_ancestor(fname)
  end,
- single_file_support = true,
- capabilities = default_capabilities,
  },
- commands = {},
+
  docs = {
  description = [[
  https://koka-lang.github.io/koka/doc/index.html
 Koka is a functional programming language with effect types and handlers.
  ]],
  default_config = {
- root_dir = [[
- ]],
- capabilities = [[default capabilities, with offsetEncoding utf-8]],
+ root_dir = [[git directory]],
+ capabilities = [[default capabilities]],
  },
  },
 }