Bump plotly.js from 1.58.4 to 2.12.1

Bumps [plotly.js](https://github.com/plotly/plotly.js) from 1.58.4 to 2.12.1.
- [Release notes](https://github.com/plotly/plotly.js/releases)
- [Changelog](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md)
- [Commits](plotly/plotly.js@v1.58.4...v2.12.1)

---
updated-dependencies:
- dependency-name: plotly.js
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>