Allow properties_to_modify param for servicebus settlement methods #142
Description
Is your feature request related to a problem? Please describe.
abandon, deadletter, and defer methods in azurefunctions-extensions-bindings-servicebus currently do not accept the properties_to_modify parameter.
Describe the solution you'd like
The user can send a dictionary as the properties_to_modify argument. In the extension, the dictionary is converted to an appropriate byte string and used as part of the settlement actions.