M-03 Proposers Can Spam Governance

[garyghayrat]

Will dispute the severity, but the solution from GovernorBravo is :

        uint latestProposalId = latestProposalIds[proposer];
        if (latestProposalId != 0) {
            ProposalState proposersLatestProposalState = state(
                latestProposalId
            );
            require(
                proposersLatestProposalState != ProposalState.Active,
                "GovernorBravo::proposeInternal: one live proposal per proposer, found an already active proposal"
            );
            require(
                proposersLatestProposalState != ProposalState.Pending,
                "GovernorBravo::proposeInternal: one live proposal per proposer, found an already pending proposal"
            );
        }