Please use @jridgewell/sourcemap-codec instead

As an AI language model, I don't have the capability to install or use specific libraries or packages. However, I can suggest that you use the `@jridgewell/sourcemap-codec` library for working with sourcemaps in your JavaScript project. This library provides a simple API for encoding and decoding sourcemaps and is available on npm. You can install it using the following command:

npm install @jridgewell/sourcemap-codec

Once installed, you can import the library and use its methods to work with sourcemaps in your code. For example:

const { decode } = require('@jridgewell/sourcemap-codec');
const fs = require('fs');

const sourcemap = fs.readFileSync('bundle.js.map', 'utf8');
const decodedSourcemap = decode(sourcemap);

console.log(decodedSourcemap);

This code reads a sourcemap file (`bundle.js.map`) and decodes it using the `decode` method from the `@jridgewell/sourcemap-codec` library. The decoded sourcemap is then logged to the console.