• Added option to provide partnerKey in headers.
• New routes introduced:-
  - getAbTestCampaignResult
  - getSharedTemplateUrl
  - createChildDomain
  - deleteChildDomain
  - getChildAccountCreationStatus
  - getChildDomains
  - getSsoToken
  - updateChildAccountStatus
  - updateChildDomain
  - getTransacBlockedContacts
  - getTransacEmailContent
  - getTransacEmailsList
  - smtpBlockedContactsEmailDelete
  - smtpLogMessageIdDelete