`@0x/contracts-staking`: Add assertions against `maximumMakersInPool` and `rewardDelegatedStakeWeight`. `@0x/contracts-staking`: Rebase against 3.0 (again).
`@0x/contracts-staking`: Add assertions against `maximumMakersInPool` and `rewardDelegatedStakeWeight`. `@0x/contracts-staking`: Rebase against 3.0 (again).