Fix a reference error when compiling with VC2019

yjoer · yjoer · commit 19350bd42ffb · 2021-10-16T01:46:46.000+08:00
diff --git a/generate/templates/manual/include/cleanup_handle.h b/generate/templates/manual/include/cleanup_handle.h
@@ -3,6 +3,7 @@
 
 #include <map>
 #include <memory>
+#include <string>
 
 namespace nodegit {
   class CleanupHandle {
