Change getDerivedStateFromProps description and parameter names #51
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Description: This lifecycle method is called on every update (including setState), not only when it receives new props.
Body: There is no access to old props and the contract in official React documentation specifies static getDerivedStateFromProps(props, state) we should stick to the same naming convention https://reactjs.org/docs/react-component.html#static-getderivedstatefromprops
Closes #49