⬆️ Bump datashader from 0.10.0 to 0.11.0 (#36)

Bumps [datashader](https://github.com/holoviz/datashader) from 0.10.0 to 0.11.0.
- [Release notes](https://github.com/holoviz/datashader/releases)
- [Changelog](https://github.com/holoviz/datashader/blob/master/doc/latest_news.html)
- [Commits](holoviz/datashader@v0.10.0...v0.11.0)

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