Completed Liskov Principle

v2.0

Refactored code so make it complient to Liskov Principle

Completed OCP Demo

The initial version of the OCP demo could not be extended without breaking OCP. The current code can be extended for e.g. you can add more Applicants by extending the current code.

Demo code that breaks the OpenClosed principle

This release has code that shows how the OpenClosed principle is broken by modifying stable code that was previously working but might break in the future if we continue modifying it.