[New chain]: Devnet Somnia

[rmeissner]

Fixes #915

[rmeissner]

Deployment Logs (for debugging):

### Building Deployment Transaction
{ chainId: 50311 }
{ estimate: '102250' }
{ gasPriceGwei: '30.0', gasPrice: '30000000000' }
{ requiredFunds: '0.0030675' }
### Submitting Transaction
{ chainId: 50311 }
{ nonce: 0 }
{
  call: {
    nonce: 0,
    gasPrice: BigNumber { _hex: '0x06fc23ac00', _isBigNumber: true },
    gasLimit: BigNumber { _hex: '0x022f2e', _isBigNumber: true },
    to: null,
    value: BigNumber { _hex: '0x00', _isBigNumber: true },
    data: '0x604580600e600039806000f350fe7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b8082525050506014600cf3',
    chainId: 50311,
    from: '0xE1CB04A0fA36DdD16a06ea828007E35e1a3cBC37'
  }
}
{
  deployedBytecode: '0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b8082525050506014600cf3',
  codeHash: '0x2fa86add0aed31f33a762c9d88e807c475bd51d0f52bd0955754b2608f7e4989'
}
{
  transactionHash: '0xe3d7b8536ea3f9d8f7c18dc33ce984f96d428801697909707e8b62f4bc1c2caa'
}
{
  transactionReceipt: {
    to: null,
    from: '0xE1CB04A0fA36DdD16a06ea828007E35e1a3cBC37',
    contractAddress: '0x914d7Fec6aaC8cd542e72Bca78B30650d45643d7',
    transactionIndex: 0,
    gasUsed: BigNumber { _hex: '0x010a47', _isBigNumber: true },
    logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
    blockHash: '0xce254ed2fc615bc2df784dfd58db0d9b3a073fb9cb2a445c28d49d5756c3ff37',
    transactionHash: '0xe3d7b8536ea3f9d8f7c18dc33ce984f96d428801697909707e8b62f4bc1c2caa',
    logs: [],
    blockNumber: 4619232,
    confirmations: 7,
    cumulativeGasUsed: BigNumber { _hex: '0x00', _isBigNumber: true },
    effectiveGasPrice: BigNumber { _hex: '0x06fc23ac00', _isBigNumber: true },
    status: 1,
    type: 0,
    byzantium: true
  }
}

Status output:

{ chainId: 50311 }
{ address: '0x914d7Fec6aaC8cd542e72Bca78B30650d45643d7' }
{
  code: '0xa06a257057350000ffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b8082525050506014600cf3'
}