Bump d3-color and d3-graphviz in /editors/code

Bump d3-color and d3-graphviz in /editors/code

Bumps [d3-color](https://github.com/d3/d3-color) to 3.1.0 and updates ancestor dependency [d3-graphviz](https://github.com/magjac/d3-graphviz). These dependencies need to be updated together.

Updates `d3-color` from 2.0.0 to 3.1.0
- [Release notes](https://github.com/d3/d3-color/releases)
- [Commits](https://github.com/d3/d3-color/compare/v2.0.0...v3.1.0)

Updates `d3-graphviz` from 4.1.1 to 5.0.2
- [Release notes](https://github.com/magjac/d3-graphviz/releases)
- [Changelog](https://github.com/magjac/d3-graphviz/blob/master/CHANGELOG.md)
- [Commits](https://github.com/magjac/d3-graphviz/compare/v4.1.1...v5.0.2)

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

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