v0.12.0: opt_stylize produces striped rows and borders

Breaking changes

• opt_stylize() now produces stripes by default. Set add_row_striping=False to remove. (#461)
• opt_stylize() now adds borders to certain styles (which was the original intention; #463)

Features

• add google_font() helper, implement in opt_table_font() and style.text() by @rich-iannone in #423
• implement row striping options by @rich-iannone (#461, #463)

Fixes

• use full html page in show() for correct utf-8 display by @machow in #458

Docs

• update superbowl example to align with the new version of Polars by @jrycw (#460, #462)

Full Changelog: v0.11.1...v0.12.0