highlighters: Rename entry points.

This tracks the API change made in the previous commit, as suggested in the
(#if 0'd) deprecation warning.

highlighters/cursor/cursor-highlighter.zsh

@@ -32,7 +32,7 @@
 : ${ZSH_HIGHLIGHT_STYLES[cursor]:=standout}
 
 # Whether the cursor highlighter should be called or not.
-_zsh_highlight_cursor_highlighter_predicate()
+_zsh_highlight_highlighter_cursor_predicate()
 {
   # accept-* may trigger removal of cursor highlighting
   [[ $WIDGET == accept-* ]] ||
@@ -40,7 +40,7 @@ _zsh_highlight_cursor_highlighter_predicate()
 }
 
 # Cursor highlighting function.
-_zsh_highlight_cursor_highlighter()
+_zsh_highlight_highlighter_cursor_paint()
 {
   [[ $WIDGET == accept-* ]] && return