Update runtime files

runtime/syntax/vuejs.vim

@@ -0,0 +1,14 @@
+" Vim syntax file
+" Language:	Vue.js Single File Component
+" Maintainer:	Ralph Giles <giles@thaumas.net>
+" URL:		https://vuejs.org/v2/guide/single-file-components.html
+" Last Change:	2019 Jul 8
+
+" Quit if a syntax file was already loaded.
+if exists("b:current_syntax")
+  finish
+endif
+
+" We have a collection of html, css and javascript wrapped in
+" tags. The default HTML syntax highlight works well enough.
+runtime! syntax/html.vim