Lab 6 - CRUD puppy with interface

[undrewb]

Puppy's have to be stored somewhere!

Implement a Puppy struct containing ID, Breed, Colour, Value.
Create Storer interface with CRUD methods for Puppy
Write a MapStore implementation of Storer backed by a map
Write a SyncStore implementation of Storer backed by a sync.Map
Keep all implementation files in the same folder and in package main
Test against the Storer interface and run in suite with both implementations