Change latex provider to luatex, closes #476

autoload/vimtex/syntax/p/tikz.vim

@@ -0,0 +1,47 @@
+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
+"
+
+function! vimtex#syntax#p#tikz#load() abort " {{{1
+  if has_key(b:vimtex_syntax, 'tikz') | return | endif
+  let b:vimtex_syntax.tikz = 1
+
+  call vimtex#syntax#misc#add_to_section_clusters('texTikzSet')
+  call vimtex#syntax#misc#add_to_section_clusters('texTikzpicture')
+
+  " Define clusters
+  syntax cluster texTikz contains=texTikzEnv,texBeginEnd,texStatement,texTikzSemicolon,texComment,@texVimtexGlobal
+  syntax cluster texTikzOS contains=texTikzOptsCurly,texTikzEqual,texMathZoneX,texTypeSize,texStatement,texLength,texComment
+
+  " Define tikz option groups
+  syntax match texTikzSet /\\tikzset\>/
+        \ contains=texStatement skipwhite nextgroup=texTikzOptsCurly
+  syntax region texTikzOpts matchgroup=Delimiter
+        \ start='\[' end='\]' contained contains=@texTikzOS
+  syntax region texTikzOptsCurly matchgroup=Delimiter
+        \ start='{'  end='}'  contained contains=@texTikzOS
+
+  syntax region texTikzpicture
+        \ start='\\begin{tikzpicture}'rs=s
+        \ end='\\end{tikzpicture}'re=e
+        \ keepend
+        \ transparent
+        \ contains=@texTikz
+  syntax match texTikzEnv /\v\\begin\{tikzpicture\}/
+        \ contains=texBeginEnd nextgroup=texTikzOpts skipwhite
+
+  syntax match texTikzEqual /=/ contained
+  syntax match texTikzSemicolon /;/ contained
+
+  highlight def link texTikzEqual Operator
+  highlight def link texTikzSemicolon Delimiter
+endfunction
+
+" }}}1
+
+
+endif