https://github.com/code-423n4/2023-09-asymmetry/blob/main/contracts/AfEth.sol#L90
The ratio configuration parameter in AfEth measures the portion of deposited value that goes into the SafEth contract. This value is intended to range between 0 (0%) and 1e18 (100%).
The setRatio() function should validate that the new value is within bounds, i.e. require(_newRatio <= 1e18).
