fix: Re-introduce config.vim into build

ftdetect/polyglot.vim

@@ -1,3 +1,14 @@
+" Enable jsx syntax by default
+if !exists('g:jsx_ext_required')
+  let g:jsx_ext_required = 0
+endif
+
+" Disable json concealing by default
+if !exists('g:vim_json_syntax_conceal')
+  let g:vim_json_syntax_conceal = 0
+endif
+
+let g:filetype_euphoria = 'elixir'
 augroup filetypedetect
 " apiblueprint:sheerun/apiblueprint.vim
 autocmd BufReadPost,BufNewFile *.apib set filetype=apiblueprint