Support for keyword arguments in function calls

[chrissiwaffler]

Is your feature request related to a problem? Please describe. Keyword arguments are not supported yet

example:

...
check_datum(own_addr=own_addr, validator_datum=datum, output_datum=datum_value)
...

Describe the solution you'd like I'd like to use keyword arguments when calling a function to have a more structured code.

Bug bounty: 2000 ADA