[@types/node] Update the definition of import.meta.resolve(…) for `…

…node` 20.6.

This was previously available:

- behind a flag,
- returning a `Promise`, and
- with an optional second `parent` parameter.

As of `node` v20.6.0 (https://nodejs.org/en/blog/release/v20.6.0), it is now:

- unflagged (with a single param),
- synchronous, and
- with the `parent` parameter only being supported behind the `--experimental-import-meta-resolve` flag.

To minimize the potential of confusion that would come from mixing the
unflagged version with flagged parameter, this change only documents the
unflagged version. This also matches the API implemented by all
browsers, avoiding the potential misunderstandings about the second
parameter in codebased with mixed frontend and backend code.

Note that there was a bug that sometimes returned a `URL` instead of a
`string` in v20.6.0, but this was fixed in v20.8.0
(nodejs/node#49695).

types/node/module.d.ts

@@ -92,18 +92,12 @@ declare module 'module' {
         interface ImportMeta {
             url: string;
             /**
-             * @experimental
-             * This feature is only available with the `--experimental-import-meta-resolve`
-             * command flag enabled.
-             *
              * Provides a module-relative resolution function scoped to each module, returning
              * the URL string.
              *
-             * @param specified The module specifier to resolve relative to `parent`.
-             * @param parent The absolute parent module URL to resolve from. If none
-             * is specified, the value of `import.meta.url` is used as the default.
+             * @param specified The module specifier to resolve relative to the current module's URL (`import.meta.url`).
              */
-            resolve?(specified: string, parent?: string | URL): Promise<string>;
+            resolve?(specified: string): string;
         }
     }
     export = Module;