ISportsMarket interface is missing buyFromAMMWithReferrer

[gigaloaded]

The interface ISportsAMM is missing the external function for buyFromAMMWithReferrer

Happy to add it in a PR if that's the intended behavior.

[danijelthales]

Feel free to do so.

[yato-sketch]

function buyFromAMMWithReferrer( address market, Position position, uint amount, uint expectedPayout, uint additionalSlippage, address referrer ) external;