vim:plugs: Update vimtex v.2.8 -> v2.13

build_dir was deprecated for out_dir and aux_dir.

.config/vim/ftplugin/tex.vim

@@ -10,7 +10,8 @@ let g:vimtex_quickfix_autoclose_after_keystrokes = 1
 " Setup latexmk and make callback possible with synctex
 " (Click into PDF to land in code)
 let g:vimtex_compiler_latexmk = {
-\	'build_dir' : 'tex_build',
+\	'aux_dir' : 'tex_build',
+\	'out_dir' : 'tex_build',
 \	'callback' : 1,
 \	'continuous' : 1,
 \	'executable' : 'latexmk',