Enable emmet-ls on vue filetype (#875)

lua/lsp/emmet-ls.lua

@@ -10,7 +10,7 @@ capabilities.textDocument.completion.completionItem.snippetSupport = true
 configs.emmet_ls = {
   default_config = {
     cmd = { "emmet-ls", "--stdio" },
-    filetypes = { "html", "css", "javascript", "typescript" },
+    filetypes = { "html", "css", "javascript", "typescript", "vue" },
     root_dir = function()
       return vim.loop.cwd()
     end,