Log Message:
py-structlog: updated to 18.1.0

18.1.0:
Deprecations:
- The meaning of the structlog[dev] installation target will change from \ 
"colorful output" to "dependencies to develop structlog" in \ 
19.1.0.
  The main reason behind this decision is that it's impossible to have a \ 
structlog in your normal dependencies and additionally a structlog[dev] for \ 
developement (pip will report an error).

Changes:
- Empty strings are valid events now.
- Do not encapsulate Twisted failures twice with newer versions of Twisted.
- structlog.dev.ConsoleRenderer now accepts a *force_colors* argument to output \ 
colored logs even if the destination is not a tty.
  Use this option if your logs are stored in files that are intended to be \ 
streamed to the console.
- structlog.dev.ConsoleRenderer now accepts a *level_styles* argument for \ 
overriding the colors for individual levels, as well as to add new levels.
- structlog.stdlib.BoundLogger.exception() now uses the exc_info argument if it \ 
has been passed instead of setting it unconditionally to True.
- Default configuration now uses plain dict\ s on Python 3.6+ and PyPy since \ 
they are ordered by default.
- Added structlog.is_configured() to check whether or not structlog has been \ 
configured.
- Added structlog.get_config() to introspect current configuration.