Bump winston-papertrail to v1.0.1.

I tried this on my local dev machine and was able to push logs to papertrail. I didn't do any more thorough testing than that.

This version introduces some real improvements to the winston-papertrail transport. The log level is now passed through to papertrail as the syslog severity. That means, it's possible to filter by log level in the papertrail interface like `severity:error` which is great for alerting and so on. :-)