v7.3.0

• Added: shortcodes from shortcodes/ in the site and theme #36
• Added: shortcode parameter schemas, list and map arguments, ::: directives, and the {% shortcode %} template tag #36
• Added: built-in details, figure, highlight, instagram, param, qr, vimeo, x and youtube shortcodes
• Added: the test build target also emits a TRX report.
• Fixed: render _index.md branch bundles as list pages
• Changed: ref and relref are now built-in regular shortcodes #36