Release 2.4.3
- Add QuoteCancelConversion, QuoteDateChangeConversion, DateChangeConversion, DateChangeDetailsConversion, PreviewSplitConversion, SplitHistoryConversion and FindConversionProfitAndLosses
- Add exponential backoff and retry strategy
- Add PaymentAuthorisation
- Add PaymentPurposeCode
- Bug fixes (#13, #16 and #17)