- Update to 0.12.3
* Add versions lookup table in the README
* Axis: Fix axis side validation
* Binary Serializers: Add support for pandas.Timestamp array
* DOC: Fix a few Sphinx warnings
* GridHeatMap: Add tests
* GridHeatmap: Fix selection
* MarketMap: Fix text style at creation
* Pie: Add tests
* Pie: Fix Labels and data update
* Remove unused function
* Update tests
* added a tutorial for building compound widgets
* cleaned up notebook metadata hence reducing the size of the file
* cleared metadata thereby reducing file size significantly
* cleared metadata, fixed image path and url link to image documentation
* cleared output cells, used pyplot to reduce code and removed redundant widgets