Release v8.0.0

⚡ Added

• Support for .NET Core 3.1
• Support for .NET Core 5.0

💉 Changed

• #116 [BREAKING CHANGE] IDialogService.Close returns false instead of throwing an exception when failing to close a dialog. This behavior aligns with the behavior of IDialogService.Activate.

💀 Removed

• [BREAKING CHANGE] Support for .NET Core 3.0 due to deprecation as of March 3, 2020