[audit] #4: Use FixedPointMathLib.mulWad in EDA.currentPrice

[Keshavrajsinghal]

From Spearbit

Description

In this context we have:
uint256 price = (startPrice * uint256(multiplier)) / FixedPointMathLib.WAD;
But one can use the already imported FixedPointMathLib from solday

Recommendation
The context can be replaced by the more optimised version from solady library:
uint256 price = FixedPointMathLib.mulWad(startPrice, uint256(multiplier));