Change latex provider to luatex, closes #476

after/ftplugin/tex.vim

@@ -0,0 +1,20 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'latex') == -1
+
+" vimtex - LaTeX plugin for Vim
+"
+" Maintainer: Karl Yngve Lervåg
+" Email:      karl.yngve@gmail.com
+"
+
+if !get(g:, 'vimtex_enabled', 1)
+  finish
+endif
+
+if exists('b:did_ftplugin_vimtex')
+  finish
+endif
+let b:did_ftplugin_vimtex = 1
+
+call vimtex#check_plugin_clash()
+
+endif