Credit Card Validator Complete

Credit Card Validator Complete

Here we use a checksum algorithm to determine the validity of a credit card number.
There's both a generalised solution using pseudo code and a Python version, both with detailed explanations and examples.

What's Changed

• Create CODE_OF_CONDUCT.md by @hrszpuk in #1

New Contributors

• @hrszpuk made their first contribution in #1

Full Changelog: https://github.com/CodingChallengesBooklet/CreditCardValidator/commits/v1.0.0