Migration from v8 to v9

See the release notes for more information on new features.

Introduced Polysharp to lower .NET requirements to: .NET 5 and later, .NET Standard 2.0
Added TokenValueFormatException to handle formatting errors
Created string.Format parity to improve performance
Classes within the StringTokenFormatter.Impl namespace have undergone a number of improvements

Settings

BlockCommands has been replaced with the more flexible Commands
- Map and Standard commands added by default as well as the previous block commands Conditional and Loop
Added FormatterDefinitions property to IInterpolatedStringSettings
IInterpolatedStringSettings now includes NameComparer property (previously only on ITokenValueContainerSettings)
TokenResolutionPolicy property moved to ICompositeTokenValueContainerSettings as it is now only used by CompositeTokenValueContainer
Included additional Value Converters by default, so that a token value of any type can be returned. Previously only Func<string> or Func<object> could be used, now for example Func<int> is supported. That applies to functions that take token name as input as well
Better settings validation is now enforced