Keyper V1.4.2

[ylembachar]

Release 1.4.2 for Gnosis Keypers

• Eon from identity registration events should be treated as keyperset index and use latest eon for the same keyperset index #692
• priv_validator_state.json to be created if it does not exist #695

DAppNode Keyper:

• Update metrics service restart policy DAppNodePackage-shutter#25