Merge pull request #645 from elbeno/add-missing-include

🐛 Add missing include to `flow/impl.hpp`

Author: elbeno

include/flow/impl.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <flow/common.hpp>
+#include <flow/log.hpp>
 #include <flow/step.hpp>
 #include <log/log.hpp>