gs1.1: use string peer id consistently#111

wemeetagain merged 1 commit intogsv1.1ChainSafe/js-libp2p-gossipsub:gsv1.1from

cayman/gs1.1-refactor-mapsChainSafe/js-libp2p-gossipsub:cayman/gs1.1-refactor-mapsCopy head branch name to clipboard