v4.0.0

Major Changes

• b1f2eab: Drop CommonJS support. The package is now ESM-only.

  There is no cjs/ output any more and exports resolves only to
  ./esm/index.js. Import it:

  import { baseline } from '@unional/fixture'

  What this breaks, precisely:

  • require('@unional/fixture') from a CommonJS file on Node older than 22.12
    now throws ERR_REQUIRE_ESM. Move the calling test file to ESM, or use
    const { baseline } = await import('@unional/fixture').
  • On Node 22.12 and newer, require() of an ES module is supported by Node
    itself and keeps working against the ESM entry.

  engines.node is now declared as >= 18 — the floor the dependencies already
  required, previously left unstated.

  Node builtins are now imported with the node: prefix (node:fs, node:path,
  node:os), which is what the published esm/ output carries. Bare fs does not
  resolve under Deno; node:fs resolves under Node, Deno and Bun alike, so the
  package is importable from more runtimes than before.

  Nothing the ESM entry exports changed: same names, same types, same esm/
  paths as 3.2.x.

Patch Changes

• 4e085ac: Drop the mkdirp dependency in favour of fs.mkdirSync(path, { recursive: true }).

  ensureFolderExist() behaves identically — mkdirp.sync has been a wrapper over
  Node's own recursive mkdir since Node 10. Removing it also removes the stale
  @types/mkdirp (v1 types against a v2 runtime) and retires the renovate PR that
  could not pass: mkdirp v3 dropped the default export, so import mkdirp from 'mkdirp'
  fails outright.