Logic

[dodoburner]

In this pull request I have achieved the following:

• Create an event handler that runs the calculator logic from the logic folder and set state in the Calculator component for the dataObj that stores the numbers and operation
• Pass the event handler as a prop to the child components and successfully lift state up
• Create an update screen method that updates the calculator screen with values from dataObj -
• Use componentDidUpdate() to run the update screen method