fix readme: TypeError when importing Parser as default from @pgsql/parser

[erikwlarsen]

Hello there! Thanks for the awesome packages. The @pgsql/parser readme shows this usage:

import Parser from '@pgsql/parser';
// or: import { Parser } from '@pgsql/parser';

// Create parser with default version (17)
const parser = new Parser();

However, when using the default import syntax, a TypeError results: TypeError: import_parser.default is not a constructor. Using a named import import { Parser } ... works fine. Should the default export be supported? I'm happy to update the readme if not.

[pyramation]

Hi! I am not able to replicate this.

https://github.com/launchql/libpg-query-node/blob/781299e8eb80a413c637d86761cc32e3cdb5619f/parser/templates/index.js.template#L91

Seems to have all exports, Parser and default:

// Main entry point for @pgsql/parser
// Provides dynamic version loading for PostgreSQL parsers

const SUPPORTED_VERSIONS = [${VERSIONS}];

export class Parser {
// ...
}

// ...

// Default export
export default Parser;