fixed linux compile

test/models/airplane.hpp

@@ -1,12 +1,7 @@
 #ifndef QUERY_AIRPLANE_HPP
 #define QUERY_AIRPLANE_HPP
 
-#include "category.hpp"
-#include "supplier.hpp"
-
 #include "matador/utils/access.hpp"
-#include "matador/utils/cascade_type.hpp"
-#include "matador/utils/field_attributes.hpp"
 
 #include <string>
 
@@ -14,7 +9,7 @@ namespace matador::test {
 
 struct airplane {
     airplane() = default;
-    airplane(unsigned int id, std::string b, std::string m)
+    airplane(const unsigned int id, std::string b, std::string m)
     : id(id)
     , brand(std::move(b))
     , model(std::move(m)) {}