Breaking Changes

• Enforce a chain ID greater than 1 which is reserved for Ethereum mainnet (#502, #503)

Enhancements

• Use EIP155 signer (#350 , #375 ,#463)
• Add eth.storageRoot endpoint (#436)
• Disable ethash (#318)
• Allow quorum node option to not configure a constellation node (#462)
• Expose Raft leader Enode ID (#426)

Bug fixes

• Istanbul events not firing & logs not captured (#460)
• Validate EVM input for private transactions (#430)
• Hashrate fix for non-POW algos (#409)
• Reject private TXs with ether value (#451)
• Update speculative chain head (#437)
• Increase minimum gas limit for network