doc: support multidimensional arrays in type link

Currently, we have at least one multidimensional array
in type signature: see `records` parameter in
https://nodejs.org/api/dns.html#dns_dns_resolvetxt_hostname_callback

Our type parser does not linkify these signatures properly.
This PR tries to fix this.

PR-URL: https://github.com/nodejs/node/pull/16207
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>

tools/doc/type-parser.js

@@ -58,6 +58,8 @@ const typeMap = {
   'URLSearchParams': 'url.html#url_class_urlsearchparams'
 };
 
+const arrayPart = /(?:\[])+$/;
+
 module.exports = {
   toLink: function(typeInput) {
     const typeLinks = [];
@@ -69,12 +71,10 @@ module.exports = {
       if (typeText) {
         let typeUrl = null;
 
-        // To support type[], we store the full string and use
+        // To support type[], type[][] etc., we store the full string
-        // the bracket-less version to lookup the type URL
+        // and use the bracket-less version to lookup the type URL
         const typeTextFull = typeText;
-        if (/\[]$/.test(typeText)) {
+        typeText = typeText.replace(arrayPart, '');
-          typeText = typeText.slice(0, -2);
-        }
 
         const primitive = jsPrimitives[typeText.toLowerCase()];