Bump chisel3 from `8fe87646` to `294bf105` (#375)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `8fe87646` to `294bf105`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/8fe876463e26d1b63e36a7ebf4a2bc62366cce81...294bf10510b2dc55312be2e87f9bed556c68afc5

)

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

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