Bump chisel3 from `f3067643` to `b7d116ce` (#135)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `f3067643` to `b7d116ce`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/f3067643c177ea57090fbcfa515804731d0ef13d...b7d116cea4f5deb5c5835b7672e9ac39cad14af1

)

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