Initial set of tests - no refactor, no new functionality
for in -> each refactor
Method extract refactor on names
Method extract for update_sellin
Method extract increase_quality
Method extract decrease_quality
Add param amount for increase & decrease quality
Refactor conditionals, simplify branching
Move up update_sell_in
Refactor out sulfras
Refactor passed_sell_in
Refactor into smaller helpers
Refactor down helper methods
First pass at conjured items (basic case passing)