Bump eslint-config-openlayers from 19.0.0 to 20.0.0

Bumps [eslint-config-openlayers](https://github.com/openlayers/eslint-config-openlayers) from 19.0.0 to 20.0.0.
- [Release notes](https://github.com/openlayers/eslint-config-openlayers/releases)
- [Commits](openlayers/eslint-config-openlayers@v19.0.0...v20.0.0)

---
updated-dependencies:
- dependency-name: eslint-config-openlayers
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]