Bump d3-color and spectacle

Removes [d3-color](https://github.com/d3/d3-color). It's no longer used after updating ancestor dependency [spectacle](https://github.com/FormidableLabs/spectacle). These dependencies need to be updated together.


Removes `d3-color`

Updates `spectacle` from 5.8.0 to 9.6.0
- [Release notes](https://github.com/FormidableLabs/spectacle/releases)
- [Commits](https://github.com/FormidableLabs/spectacle/compare/v5.8.0...spectacle@9.6.0)

---
updated-dependencies:
- dependency-name: d3-color
  dependency-type: indirect
- dependency-name: spectacle
  dependency-type: direct:production
...

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Author: dependabot[bot]