Bump tap from 15.0.3 to 15.0.4 (#40)

Bumps [tap](https://github.com/tapjs/node-tap) from 15.0.3 to 15.0.4.
- [Release notes](https://github.com/tapjs/node-tap/releases)
- [Commits](tapjs/tapjs@v15.0.3...v15.0.4)

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