Breaking

• #17 Upgrade to ASP.NET MVC Core 2.1

Improvements

• #17 Multitarget ASP.NET CORE 2.1 and 3.0
• #17 New assertions to test IConvertToActionResult: .BeActionResult(), .BeConvertibleTo()
• #17 New assertions to test ActionResult<T>: .BeConvertibleTo(), .Result and .Value property
• #14 Improvements to the assertion failure messages.
• #14 Classes and Methods now have documentation comments. (They was there before but not compiled into the nuget.)
• #14 Fixed some method's return type in FileResultAssertions and it's derived classes.
• #14 PhysicalFileResultAssertions now have WithPhysicalFile and WithFileName, also VirtualFileResultAssertions have WithVirtualFile, WithFileName, so the preferred method can be choosed for testing.