Added PeachPie to list of VMs

README.md

 
 * [Hack](https://hacklang.org/) - A programming language for HHVM.
 * [HHVM](https://github.com/facebook/hhvm) - A Virtual Machine, Runtime and JIT for PHP by Facebook.
+* [PeachPie](https://github.com/peachpiecompiler/peachpie) - PeachPie is a PHP compiler and runtime for .NET and .NET Core, which allows entire PHP applications to run on the modern, secure and performant .NET and .NET Core platforms.
 
 ### Text Editors and IDEs
 *Text Editors and Integrated Development Environments (IDE) with support for PHP.*