trying to fix MSVC build 4

pfeatherstone · pfeatherstone · commit 2d955e16a012 · 2025-06-15T09:50:01.000+01:00
diff --git a/examples/unit_tests/message.cpp b/examples/unit_tests/message.cpp
@@ -1,3 +1,4 @@
+#include <ostream>
 #include <string_view>
 #include <vector>
 #include <http.h>
