I was doubting if instead of decreasing the quality in 2 steps, adding a parameter to the decrease_quality method and decrease it in 1 go was a better option.
I didnt go for it in the end as I like the verbosity at the moment and it's easier to follow later on why we decrease multiple times instead of e.g. decrease_quality(n) method
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.
