Changes to Generate invoice PDF

request property locale was restricted to a list of enum values

the version request property's minLength was increased from 0 to 2

added the pattern ^(?:v\d+[a-z]*)$ to the request property version

the version request property's maxLength was set to 16

added the new optional request property overrides/invoice

the request property locale became nullable

the request property overrides became nullable

the testMode request property default value false was removed

the version request property default value v1l was removed

added the new de enum value to the request property locale

added the new en enum value to the request property locale

added the new fr enum value to the request property locale

added the new it enum value to the request property locale

added the new undefined enum value to the request property locale