Feature Request: Context logging should pass **kwargs to underlying _logger

[ihs-nick]

According to the official python3 documentation, the main ways to pass stack/traceback information is through kwargs. Right now, the logger only thing passed to the logger beyond the message is *args which doesn't allow stack information to be passed (class referenced here). This should be as simple as adding **kwargs to each. I'm willing to submit a pull request if interested in merging this.