Bump chisel3 from `df5a9545` to `9f148457` (#334)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `df5a9545` to `9f148457`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/df5a95454ff0414d1d3ce16d06dbe27b152e3751...9f1484572e2e4185e87a9cfb03b253870636c12c

)

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

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