xmrtaker occasionally hangs after `ContractReady` stage
I've noticed occasionally when taking a swap on stagenet that the taker will hang after the `ContractReady` stage and effectively not do anything. I haven't investigated too deeply into this, but it might be due to the `Claimed` event not being read properly, since on restarting the daemon, it'll manage to complete the swap. However I only tried this once so need to double check.