Change latex provider to luatex, closes #476

ftplugin/bib.vim

@@ -0,0 +1,28 @@
+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')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal comments=sO:%\ -,mO:%\ \ ,eO:%%,:%
+setlocal commentstring=\%\ %s
+
+" Initialize local LaTeX state if applicable
+let b:vimtex = getbufvar('#', 'vimtex', {})
+if empty(b:vimtex) | unlet b:vimtex | finish | endif
+
+" Apply errorformat for properly handling quickfix entries
+silent! call b:vimtex.qf.set_errorformat()
+
+endif