Log Message:
py-ICU: updated to 2.8

Version 2.7.4 -> 2.8
--------------------
- fixed test failure in test_DateTimeParserGenerator.py with version 70.1rc
- added wrappers for UCurrNameStyle and for ucurr_getName() onto CurrencyUnit
- added support for ICU 70.1
- added FieldPosition-less overloads to RuleBasedNumberFormat.format()
- added pyproject.toml file to (also) build via python -m build