Add parsers object to RuleParams type, annotate every rule definition with Rule type for better type validation.

lib/md010.js

@@ -8,6 +8,8 @@ const { codeBlockAndSpanRanges, lineMetadata } = require("./cache");
 
 const tabRe = /\t+/g;
 
+// eslint-disable-next-line jsdoc/valid-types
+/** @type import("./markdownlint").Rule */
 module.exports = {
   "names": [ "MD010", "no-hard-tabs" ],
   "description": "Hard tabs",
@@ -44,7 +46,7 @@ module.exports = {
               onError,
               lineIndex + 1,
               "Column: " + column,
-              null,
+              undefined,
               [ column, length ],
               {
                 "editColumn": column,