add 14.29 (first supported) and 14.31 (latest one)

Author: Hana Dusíková

.github/workflows/tests.yml

@@ -63,7 +63,7 @@ jobs:
   msvc:
     strategy:
       matrix:
-        version: [14.16, 14.22, 14.25, 14.29, 14.31]
+        version: [14.29, 14.31]
       fail-fast: false
     name: "MSVC ${{ matrix.version }} (C++20)"
     runs-on: windows-2022

README.md

@@ -122,7 +122,7 @@ Otherwise you will get missing symbols if you try to use the unicode support wit
 * clang 12.0+ (C++17 syntax, C++20 cNTTP syntax)
 * gcc 8.0+ (template UDL, C++17 syntax)
 * gcc 9.0+ (C++17 & C++20 cNTTP syntax)
-* MSVC 14.16+ (Visual Studio 15.9+) (C++17 syntax only) (semi-supported, I don't have windows machine)
+* MSVC 14.29+ (Visual Studio 16.11+) (C++20) 
 
 ### Template UDL syntax