Refactor: Improve prop validation
Refactor: Improve prop validation

- Change victoryStatistics prop validation

Before:
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victoryStatistics: React.PropTypes.object
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After:
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victoryStatistics: React.PropTypes.objectOf(React.PropTypes.number)
———————

Lingvokot/Tic-Tac-Toe-React,Lingvokot/Tic-Tac-Toe-React,Lingvokot/Tic-Tac-Toe-React