build: bump merge2 from 1.2.3 to 1.4.1

Bumps [merge2](https://github.com/teambition/merge2) from 1.2.3 to 1.4.1.
- [Release notes](https://github.com/teambition/merge2/releases)
- [Commits](teambition/merge2@v1.2.3...v1.4.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]