Changes to Public Api Buy

added the new optional request property squads

added the new optional request property test

the gb/anyOf[subschema #1] request property's min was decreased from 1.00 to 0.00

added the new optional request property days

added the new optional request property gb

added the new optional request property ip

the request property product_id became optional

request property product_id list-of-types was widened by adding types null to media type application/json

endpoint added