Bump split2 from 4.1.0 to 4.2.0

Bumps [split2](https://github.com/mcollina/split2) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/mcollina/split2/releases)
- [Commits](mcollina/split2@v4.1.0...v4.2.0)

---
updated-dependencies:
- dependency-name: split2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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