Add Rule.parser property for custom rules to specify which Markdown parser output they use, honor it strictly, and add full type support.

lib/md052.js

@@ -12,6 +12,7 @@ module.exports = {
   "description":
     "Reference links and images should use a label that is defined",
   "tags": [ "images", "links" ],
+  "parser": "none",
   "function": function MD052(params, onError) {
     const { config, lines } = params;
     const shortcutSyntax = config.shortcut_syntax || false;