Bump esm-utils from 4.1.2 to 4.2.1 (#946)

Bumps [esm-utils](https://github.com/fisker/esm-utils) from 4.1.2 to 4.2.1.
- [Release notes](https://github.com/fisker/esm-utils/releases)
- [Commits](fisker/esm-utils@v4.1.2...v4.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]