@mdx-js/esbuild not resolving relative paths

[DCsunset]

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)

Affected packages and versions

@mdx-js/esbuild: 2.0.0-rc.2

Link to runnable example

No response

Steps to reproduce

Create the following directory structure:

index.mdx
pages/
    page.mdx
    data.js

Suppose index.mdx includes import Component from "./pages/page.mdx",
and pape.mdx includes import data from "./data.js".

Then use @mdx-js/esbuild to build:

import esbuild from 'esbuild'
import mdx from '@mdx-js/esbuild'

await esbuild.build({
  entryPoints: ['index.mdx'],
  outfile: 'output.js',
  bundle: true,
  format: 'esm',
  plugins: [mdx({})]
})

Expected behavior

It's expected to bundle them without any error.

Actual behavior

An error occurs:

pages/page.mdx:3:17: error: Could not resolve "./data.js"
    3 │ import data from "./data.js";

Runtime

Node v16

Package manager

npm v8

OS

Linux

Build and bundle tools

esbuild