v2.0.1-alpha-3

This release fixes an out-by-one bug in the item_inclusion_string when knapsacks had repeated and excluded items.
This issue would cause an infinite loop as it would not find the second item.

v2.0.1-alpha-2

functionally the same as 2.0.0-alpha.1, however:
split classes into their own files
created example scripts
added pyproject.toml
added wheel dist files

v2.0.0-beta.1

functionally the same as 2.0.0-alpha.1, but with improved docstrings, tests, and code structure

v2.0.0-alpha.1

Working release of model version 2 with both decision and optimisation versions of the Knapsack Problem.