Diff to the kyber swap contract swapMath in estimateIncrementalLiquidity function

[WagZol]

Error:

In the kyber swap elastic contract at the 'estimateIncrementalLiquidity' function, if the isToken0 = false then the 'b' variable will be equal to feeInFeeUnit is subtracted from C.FEE_UNITS, multiplied by liquidity, but in the sdk implementation multiplication is missing

Proof:

Part of original SwapMath.lib of Kyber swap elastic pool contract:

Implementation of the 'estimateIncrementalLiquidity' of the SDK:

ks-sdk-elastic/src/utils/swapMath.ts

Line 185 in e277662

let b = JSBI.subtract(BPS, fee)

@viet-nv could you please check it?