Add Bunyan standard serializer

[2snEM6]

Expected behavior

To be able to log error objects along with metadata and a description message, by following this format:
const anErrorInstance = new Error('Storage read error'); logger.error({err: anErrorInstance, blockId: '1234', 'Failure when generating a new block'}`

This produces the following output:

Actual behavior

When trying to log error object along with metadata and a description message, errors are not being properly printed.

Steps to reproduce

Which version(s) does this affect? (Environment, OS, etc...)

development