1.0-beta.2

• Add support for Edge Chromium/WebView2
• Update all projects to .NET 5.0, this is a breaking change
• Add nullable reference types annotations
• Add Navigating event and include URL in PageLoad event
• Fully implement app menu on macOS
• Update client package to enable ES2020 modules
• Update window size handling and add border styles, see #18
• Fix usage of wrong event handler for GTK show event
• Fix crash when touch bar is available, see #11