All tests pass, both rspec as texttests. This gives me a good base to start implementing Conjured items.
The idea is to implement Conjured items first before starting to clean up the code.
My thought process when implementing new code is always: make it work -> make it safe -> clean it up
Also noticed I made a mistake in some specs, would normally optimise spec code later on.
Added an extra test for when sell_in is 1 for safety as it depends on the order of operations in the extraction I make.
