Product list

Create a module that can read a product file and do two things:

• return a unique list of products in the file
• return the total number of items sold for each product

The module should:

• be called products.js
• have two Asynchronous methods:
  • productNames - returns a list of products
  • productsSold - returns a map of how many of each product is sold - mapping productName to quantity sold.
• use the ./files/products.csv file to test

Once all the tests are passing you are done!