1. Make a FORK - NOT A CLONE - of this repo, so you have a version of this challenge.
2. git clone your fork of the repo
3. Run the following:

$ code .
$ yarn
$ yarn start

You're starting your own credit card business. You need to come up with a new way to validate credit cards with a simple function called validateCreditCard that returns true or false.

Here are the rules for a valid number:

1. Number must be 16 digits; all of them must be numbers.
2. The final digit must be even.
3. The sum of all the digits must be greater than 16.

Add functionality so that you must have at least two different digits represented (all of the digits cannot be the same)

console.log(validateCreditCard("9999777788880000")); // => true
console.log(validateCreditCard("6666666666661666")); // => true
console.log(validateCreditCard("a92332119c011112")); // => false
console.log(validateCreditCard("4444444444444444")); // => false
console.log(validateCreditCard("1211111111111112")); // => true
console.log(validateCreditCard("1111111111111110")); // => false