message: Bump version-date.
diff: @@ -95,7 +95,7 @@ if(NOT DEFINED VCPKG_VERSION OR VCPKG_VERSION STREQUAL "")
  set(VCPKG_VERSION "unknownhash")
  endif()
  -set(VCPKG_BASE_VERSION "2021-10-18")
  +set(VCPKG_BASE_VERSION "2021-10-20")
  set(CMAKE_CXX_EXTENSIONS OFF)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
  