Bump firrtl from `07aa895` to `3916559` (#369)

Bumps [firrtl](https://github.com/freechipsproject/firrtl) from `07aa895` to `3916559`.
- [Release notes](https://github.com/freechipsproject/firrtl/releases)
- [Commits](https://github.com/freechipsproject/firrtl/compare/07aa89505e8b495e0005c008f96ce55de29d90c0...39165592d9d2a36b319091c9993e742f7091c046

)

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

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