Bump chisel3 from `17c93050` to `70da39e1` (#286)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `17c93050` to `70da39e1`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/17c930506046bc59f8a13a0c82734e7334b27613...70da39e140e96a9302a94864f077529e02596ef5

)

---
updated-dependencies:
- dependency-name: chisel3
  dependency-type: direct:production
...

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