Bump chisel3 from `ea44af95` to `cea238bb` (#306)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `ea44af95` to `cea238bb`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/ea44af954657f743c45fbc45125e197ac3aadd20...cea238bb9f6cb364d0c6c6229ff316eebc8224ec

)

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

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