Bump chisel3 from `94aeeb1a` to `dbffb877` (#315)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `94aeeb1a` to `dbffb877`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/94aeeb1a5c2fe38777a9004ba36f8b353e96b292...dbffb8779efca6bea8699ed80a04b1d47d657d93

)

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

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