bugfix(spec): fixes functionality of Storage tests
bugfix(spec): completes code for Storage testing

all tests passing
chore(refactor): improves code readability
chore(specs): adds pending tests for future dev
chore(specs): adds testing for Storage#get_optimization_number
chore(refactor): small changes in naming
chore(specs): adds testing for future dev and renames Storage#size to Storage#get_number_of_items
chore(specs): context wrapper for tests, and changes model name from Color to Category
chore(specs): upcases class constant
chore(specs): updates for deprecated names
chore(specs): reorganizes tests to be more clear, and added comments
chore(specs): corrects naming for deprecated methods
chore(specs): updates naming from deprecated
Merged branch from feature-seed-update to feature-implement-color-code
feature(mailer): generates expiration mailer skeleton
feature(mailer): adds expiration method
Merge branch 'feature-implement-color-code' of https://github.com/Lambin/fast-meadow-6661 into feature-auto-mailer
chore(users) adds User model and migration to skeleton
chore(users): adds password column to Users
chore(specs): creates tests for Users