Bump chisel3 from `b15a1bc7` to `e3f3c5e7` (#208)

Bumps [chisel3](https://github.com/freechipsproject/chisel3) from `b15a1bc7` to `e3f3c5e7`.
- [Release notes](https://github.com/freechipsproject/chisel3/releases)
- [Commits](https://github.com/freechipsproject/chisel3/compare/b15a1bc7a1b6be06952b5407c7ba043b434e1268...e3f3c5e7c5b2bd0f4d4d5d6470908fa0dc78fc74

)

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

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