build: compile with C++20 support on Windows

Our Linux build infra is not ready for it yet,
but V8 is making it difficult to compile on Windows
without it.

Refs: nodejs#45402

Author: StefanStojanovic

common.gypi

@@ -286,7 +286,7 @@
       'VCCLCompilerTool': {
         'AdditionalOptions': [
           '/Zc:__cplusplus',
-          '-std:c++17'
+          '-std:c++20'
         ],
         'BufferSecurityCheck': 'true',
         'DebugInformationFormat': 1,          # /Z7 embed info in .obj files