yvals_core.h: Require _MSC_VER 1925 (#430)

Fixes #422.

stl/inc/yvals_core.h

@@ -446,8 +446,8 @@
 #error STL1000: Unexpected compiler version, expected Clang 9.0.0 or newer.
 #endif // ^^^ old Clang ^^^
 #elif defined(_MSC_VER)
-#if _MSC_VER < 1924 // Coarse-grained, not inspecting _MSC_FULL_VER
-#error STL1001: Unexpected compiler version, expected MSVC 19.24 or newer.
+#if _MSC_VER < 1925 // Coarse-grained, not inspecting _MSC_FULL_VER
+#error STL1001: Unexpected compiler version, expected MSVC 19.25 or newer.
 #endif // ^^^ old MSVC ^^^
 #else // vvv other compilers vvv
 // not attempting to detect other compilers