Bump chisel3 from `eee0b1e9` to `b29731bd` (#141)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `eee0b1e9` to `b29731bd`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/eee0b1e97ba17f9860d4d855ffeecb1adba4b4cb...b29731bdd99d65e189cc676ac1dec2bcddd72621

)

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