update(Ticket/TwabLib): enforce passing uint208 too TwabLib from Ticket

[kamescg]

No description provided.

[linear]

POOL-1675 TwabLib: casting should be handled in the function param

Line example: https://github.com/pooltogether/pooltogether-contract-tsunami/blob/ec1e547eb5027b6c5323be8f9dcb25d89ae9b59c/contracts/libraries/TwabLib.sol#L49

Instead of casting on line 61, we should force the function param to be uint208.

This problem is recurrent across our codebase so we also have to improve it elsewhere.

Other lines:

• https://github.com/pooltogether/pooltogether-contract-tsunami/blob/ec1e547eb5027b6c5323be8f9dcb25d89ae9b59c/contracts/libraries/TwabLib.sol#L61

• https://github.com/pooltogether/pooltogether-contract-tsunami/blob/ec1e547eb5027b6c5323be8f9dcb25d89ae9b59c/contracts/libraries/TwabLib.sol#L89

• https://github.com/pooltogether/pooltogether-contract-tsunami/blob/ec1e547eb5027b6c5323be8f9dcb25d89ae9b59c/contracts/libraries/TwabLib.sol#L322