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

lib/md054.js

@@ -27,6 +27,7 @@ module.exports = {
   "names": [ "MD054", "link-image-style" ],
   "description": "Link and image style",
   "tags": [ "images", "links" ],
+  "parser": "micromark",
   "function": (params, onError) => {
     const config = params.config;
     const autolink = (config.autolink === undefined) || !!config.autolink;