Bump chisel3 from `3e422dc9` to `d8733957` (#195)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `3e422dc9` to `d8733957`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/3e422dc969e2f73be703138aa17988be5657b132...d8733957b584afda3239f239e034b0a7267c0732

)

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

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