Improved platform support notice in readme

Author: staxfur

README.md

@@ -40,10 +40,13 @@ We have created serval examples to show possible use cases of CPP-Terminal and t
 | Platform | Supported versions | Coverage by unit test |
 | -------- | ------------------ | --------------------- |
 | Windows  | 10 and higher*     | MSVC                  |
+| (Windows) MSYS2    | All supported      | /                     |
+| (Windows) Cygwin | All supported | / |
+| (Windows) MinGW | All supoorted | / |
 | MacOS    | All supported      | Apple-clang           |
 | Linux    | All supported      | GCC                   |
 
-* Windows versions prior 10 have no proper terminal supports. They are lacking ANSI support which is required by CPP-Terminal.
+> Windows versions prior Windows 10 are missing the Win32 API functionality for entering the "raw mode" and therefore won't work. They are also lacking ANSI support. See #173 for adding support to prior windows versions for MSVC / Win32.
 
 ## How to use