settings: Disable C++20 path on MSVC

Even though it compiles and runs fine on the latest Windows versions,
older LTSC builds will crash due to lacking support somewhere in the OS.

For now just disable it for MSVC until either Microsoft fixes this or we
no longer support 1809 LTSC.

src/common/settings.cpp

@@ -26,7 +26,8 @@ std::string GetTimeZoneString() {
 
     std::string location_name;
     if (time_zone_index == 0) { // Auto
-#if __cpp_lib_chrono >= 201907L
+#if __cpp_lib_chrono >= 201907L && !defined(_MSC_VER)
+        // TODO: Remove `!defined(_MSC_VER)` when we no longer support Windows 10 1809 LTSC
         const struct std::chrono::tzdb& time_zone_data = std::chrono::get_tzdb();
         try {
             const std::chrono::time_zone* current_zone = time_zone_data.current_zone();