Update to Roslyn V3.4.0

Target netstandard2.1

Update to Roslyn V2.9.0

Update to Roslyn V2.9.0

Add support for hidden properties

Update to Roslyn V2.8.0

 Add support for ValueTuple, Type and plain Object

 Improve PropertyCSScriptSerialize constructor exception message

Update to Roslyn V2.3.1

Update to Roslyn V2

Update to VS2017

Increase max length for string literal

Use verbatim literals for multi-line strings

V1.1.0