Update readme

Author: walbourn

README.md

@@ -59,7 +59,7 @@ Documentation is available on the [Microsoft Docs](https://docs.microsoft.com/en
 
 ## Compiler support
 
-Officially the library is supported with Microsoft Visual C++ 2019 or later, clang/LLVM v12 or later, and GCC 9 or later. It should also compile with the Intel C++ and MinGW compilers.
+Officially the library is supported with Microsoft Visual C++ 2019 (16.11) or later, clang/LLVM v12 or later, and GCC 10 or later. It should also compile with the Intel C++ and MinGW compilers.
 
 When building with clang/LLVM or other GNU C compilers, the ``_XM_NO_XMVECTOR_OVERLOADS_`` control define is set because these compilers do not support creating operator overloads for the ``XMVECTOR`` type. You can choose to enable this preprocessor define explicitly to do the same thing with Visual C++ for improved portability.
 
@@ -69,8 +69,11 @@ With GCC, the SAL annotation preprocessor symbols can conflict with the GNU impl
 
 ```
 #include <algorithm>
+#include <iterator>
 #include <utility>
 
+#include <format> // C++20 header
+
 #include <DirectXMath.h>
 ```