Fix include for C++17 workers

robinchrist · robinchrist · commit 0682be00299c · 2020-03-06T20:56:50.000+01:00
diff --git a/nan.h b/nan.h
@@ -86,6 +86,7 @@
 # include <string_view>
 #endif
 #if NAN_ENABLE_CPP17_WORKERS
+# include <functional>
 # include <mutex>
 #endif
 
