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* Drop `indent=2` for log records
* Drop `colorama` and `development` mode.
* Support two structlog processors, `JSONRenderer <https://www.structlog.org/en/stable/api.html#structlog.processors.JSONRenderer>`_
and `KeyValueRenderer <https://www.structlog.org/en/stable/api.html#structlog.processors.KeyValueRenderer>`_.
* Configuration is more clean now.
* Decouple Structlog configuration from nameko dependency.