Allow different highlighting at cursor

(related #30)

autoload/matchup/matchparen.vim

@@ -319,8 +319,10 @@ function! s:matchparen.highlight(...) abort dict " {{{1
   endif
 
   for l:corr in l:corrlist
-    call add(w:matchup_match_id_list, matchaddpos('MatchParen',
-       \   [[l:corr.lnum, l:corr.cnum, strlen(l:corr.match)]]))
+    let l:group = l:corr.match_index == l:current.match_index
+          \ ? 'MatchParenCur' : 'MatchParen'
+    call add(w:matchup_match_id_list, matchaddpos(l:group,
+          \ [[l:corr.lnum, l:corr.cnum, strlen(l:corr.match)]]))
   endfor
 
   call matchup#perf#toc('matchparen.highlight', 'end')

plugin/matchup.vim

@@ -43,6 +43,8 @@ endtry
 command! NoMatchParen call matchup#matchparen#toggle(0)
 command! DoMatchParen call matchup#matchparen#toggle(1)
 
+hi def link MatchParenCur MatchParen
+
 if get(g:, 'matchup_override_vimtex', 0)
   let g:vimtex_matchparen_enabled = 0
 endif