vim: add lua ls

vimrc

@@ -121,6 +121,8 @@ else
 endif
 Plug 'neovim/nvim-lspconfig'
 
+Plug 'folke/lua-dev.nvim'
+
 endif
 
 call plug#end()
@@ -257,6 +259,15 @@ require'compe'.setup {
   };
 }
 
+local luadev = require("lua-dev").setup({
+  lspconfig = {
+    cmd = {"lua-language-server"}
+  },
+})
+
+local lspconfig = require('lspconfig')
+lspconfig.sumneko_lua.setup(luadev)
+
 EOF
 
 hi LspReferenceRead cterm=bold ctermbg=red guibg=LightYellow