- Property `text_color` deprectated in `ReportCol`, replaced by a luminance-based color using the background color
- Property `text_color` deprectated in `ReportHeader`, replaced by a luminance-based color using the background color
- Property `width` deprectated in `ReportHeader`, replaced by the function `autofit()` to automatically fit the header width
- New entity `CustomReportPage` that receives a custom builder function to build the page
- Property `export_format` deprecated in `Report`, replaced to an argument of the function `export()`