v1.0.3

This release fixes issues that have been responsible for Nimbus' lower peer scores on the network.

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New additions:

• New metrics to track the syncing progress of the Eth1 deposit contract
  monitor.

• A new web3 test command to test the compatibility of a web3 provider
  before using it. Example usage: build/nimbus_beacon_node web3 test ws://localhost:1000

We've fixed:

• An incorrect timing error that occurred when sending aggregated attestations.

• Stale ENR records that didn't take into account the dynamic attestation subnet
  hopping.

• An invalid error message (validator
  state unknown) produced by the deposits exit command.