build(deps-dev): bump miniflare from 3.20231030.0 to 3.20231218.4

Bumps [miniflare](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/miniflare) from 3.20231030.0 to 3.20231218.4.
- [Release notes](https://github.com/cloudflare/workers-sdk/releases)
- [Changelog](https://github.com/cloudflare/workers-sdk/blob/main/packages/miniflare/CHANGELOG.md)
- [Commits](https://github.com/cloudflare/workers-sdk/commits/miniflare@3.20231218.4/packages/miniflare)

---
updated-dependencies:
- dependency-name: miniflare
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>