Fix headers

Author: arkaprabha

PWGLF/Tasks/Nuspex/Antinucleitask.cxx

@@ -31,6 +31,8 @@
 #include <TParameter.h>
 
 #include <cmath>
+#include <string>
+#include <vector>
 
 using namespace o2;
 using namespace o2::framework;