Bump bl from 3.0.0 to 3.0.1

Bumps [bl](https://github.com/rvagg/bl) from 3.0.0 to 3.0.1.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](rvagg/bl@v3.0.0...v3.0.1)

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