* serde: included to support Serialization/Deserialization
* chrono: included make use of a ISO 8601 complient time library
Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
* helper function to test validity of given policynumber
- use a hashmap as a reference store with valid policynumbers
- check the given policynumber against the reference
Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>