`string.ToInterpolatedString()` in v9

[andywilsonuk]

Hi @TonyValenti, regarding string.ToInterpolatedString(), I'm removing this in v9 because 1) string it very overloaded already and 2) creating the InterpolatedString ahead of time is a pretty advanced feature which is better served by using the InterpolatedStringResolver.

I see the Resolver as the preferred way to interact with the library now as it is settings aware and all the methods are provided with the settings in context. In contrast, using the string extensions either means using the global settings or passing in the settings objects for every expansion.

Version 9 is out today.

[andywilsonuk]

Oh, love the snazzy icon!