The highlight of this release is the option to show local variables in tracebacks.

[8.0.0] - 2020-10-03

### Added

• Added Console.bell method
• Added Set to types that Console.print will automatically pretty print
• Added show_locals to Traceback
• Added theme stack mechanism, see Console.push_theme and Console.pop_theme

Changed

• Changed Style.empty to Style.null to better reflect what it does
• Optimized combining styles involving a null style
• Change error messages in Style.parse to read better

Fixed

• Fixed Table.__rich_measure__
• Fixed incorrect calculation of fixed width columns