Prop 82: Update Swap Taker Fee to 0.075%

This proposal would change the swap takers fee to 0.075% while the latest mainnet upgrade which will take place shortly after introduces a new perp takers fee which will be set to 0.075% as well.

Reference to discussion: https://common.xyz/elys-network/discussion/1279412-signaling-proposal-adjustment-of-taker-fees-for-spot-and-perpetual-trading