Widget-periodictable

**Full Changelog**: https://github.com/osscar-org/widget-periodictable/compare/v4.1.2...v4.1.3

**Full Changelog**: https://github.com/osscar-org/widget-periodictable/compare/v4.1.1...v4.1.2

**Full Changelog**: https://github.com/osscar-org/widget-periodictable/compare/v4.1.0...v4.1.1

**Full Changelog**: https://github.com/osscar-org/widget-periodictable/compare/v3.1.0...v4.1.0

Updates and changes:

* update the widgets for ipywidgets 8.x

**Full Changelog**: https://github.com/osscar-org/widget-periodictable/compare/v3.0.0...v3.1.0

Updates and changes:

* Upgrade to support JupyterLab 3.x.
* Fix the empty initialization of the periodic table.