Add tests for new actions, and rename old one
Add tests for new actions, and rename old one

- Change CHANGE_GRID to PLAYER_MOVE
- Change changeGridAction to playerMoveAction
- Add tests for computerMoveAction
- Add tests for resetGameAction

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