Merge pull request #44 from leafOfTree/css-group-error

Fix E409 when css syntax isn't loaded

test/cases/no-css.vim

@@ -0,0 +1,7 @@
+" Without css syntax, like only script in config
+let g:vim_vue_plugin_config = {'syntax': {'script': ['javascript']}}
+let g:test_flatten = 1
+
+function! Check()
+  call ExpectEqual(GetVueTag(2), 'script', 'tag')
+endfunction

test/cases/no-css.vue

@@ -0,0 +1,7 @@
+<script>
+export default {
+  data() {
+    return { a: 1 }
+  },
+}
+</script>