Stop using module.createRequire (problematic under webpack), incorporate and export resolveModule helper from markdownlint-cli2.

lib/resolve-module.cjs

@@ -0,0 +1,52 @@
+// @ts-check
+
+"use strict";
+
+// @ts-ignore
+// eslint-disable-next-line camelcase, no-inline-comments, no-undef
+const nativeRequire = (typeof __non_webpack_require__ === "undefined") ? require : /* c8 ignore next */ __non_webpack_require__;
+// Captures the native require implementation (even under webpack).
+
+/**
+ * @typedef RequireResolveOptions
+ * @property {string[]} [paths] Additional paths to resolve from.
+ */
+
+/**
+ * @callback RequireResolve
+ * @param {string} id Module name or path.
+ * @param {RequireResolveOptions} options Options to apply.
+ * @returns {string} Resolved module path.
+ */
+
+/**
+ * Resolves modules according to Node's resolution rules.
+ *
+ * @param {RequireResolve} resolve Node-like require.resolve implementation.
+ * @param {string} id Module name or path.
+ * @param {string[]} [paths] Additional paths to resolve from.
+ * @returns {string} Resolved module path.
+ */
+const resolveModuleCustomResolve = (resolve, id, paths = []) => {
+  // resolve.paths is sometimes not present under webpack or VS Code
+  // @ts-ignore
+  const resolvePaths = resolve.paths?.("") || [];
+  const allPaths = [ ...paths, ...resolvePaths ];
+  return resolve(id, { "paths": allPaths });
+};
+
+/**
+ * Resolves modules according to Node's resolution rules.
+ *
+ * @param {string} id Module name or path.
+ * @param {string[]} [paths] Additional paths to resolve from.
+ * @returns {string} Resolved module path.
+ */
+const resolveModule = (id, paths) => (
+  resolveModuleCustomResolve(nativeRequire.resolve, id, paths)
+);
+
+module.exports = {
+  resolveModule,
+  resolveModuleCustomResolve
+};