smarie/python-pytest-cases: 2.3.0 - better `LazyValue` internal API

new clone(self, remove_int_base=False) API on LazyValue and LazyTupleItem instances. With this new API, on old pytest < 5.3, other plugins such as pytest-harvest can easily clone the contents from lazy values without having them inherit from int - which was a dirty hack used by pytest-cases to trick pytest to generate acceptable test ids in these old pytest versions. Also improved the LazyValue, LazyTuple and LazyTupleItem object model with equality and repr. Fixes pytest-harvest#43 See documentation page for details