v8.0.0-rc.1

What's Changed

• Introduce turbo:{before-,}morph-{element,attribute} events by @seanpdoyle in #1097
• Preloader: Rename header to x-purpose to avoid it being stripped by @pfeiffer in #1108
• Morph with ignoreActiveValue: true by @seanpdoyle in #1141
• Do not invalidate pages in visits that don't render by @afcapel in #1144
• Ensure page refreshes cause a reload when assets change by @afcapel in #1146
• LinkPrefetchObserver: replace dataset with getAttribute by @seanpdoyle in #1148
• Page refreshes: Don't render previews by @brunoprietog in #1098
• Drive turbo-frame with Turbo.visit(url, { frame:, action: }) by @seanpdoyle in #1135

Full Changelog: v8.0.0-beta.4...v8.0.0-rc.1