Setters should check the input value - ie make revert if it is the zero address or zero
Instances include:
function updateMatchExecutor
function updateStakeLevelThreshold There should be a check that the new threshold does not break the following: BRONZE < SILVER < GOLD < PLATINUM
function updatePenalties
function updateInfinityTreasury
Add non-zero checks - address or uint - to the setters aforementioned.
