build(deps): bump pixi.js in /eclipsing-binary-simulator

Bumps [pixi.js](https://github.com/pixijs/pixijs) from 7.4.2 to 8.6.6.
- [Release notes](https://github.com/pixijs/pixijs/releases)
- [Commits](pixijs/pixijs@v7.4.2...v8.6.6)

---
updated-dependencies:
- dependency-name: pixi.js
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>