[upstream:v8.10.3] Fix ContextifyContext::PropertySetterCallback() (#140)

... which must return result if the request was intercepted.

Author: isheludko

src/node_contextify.cc

@@ -459,6 +459,7 @@ void ContextifyContext::PropertySetterCallback(
   }
 
   USE(ctx->sandbox()->Set(context, property, value));
+  args.GetReturnValue().Set(true);
 }
 
 // static