Log Message:
p5-Devel-StackTrace: update to 2.03.

2.03   2017-11-18

- If all frames in the trace were skipped (via skip_frames, frame_filter,
  ignore_*, etc.), then the stringified stack trace would be an empty
  string. Now this has been changed to always return the message given to the
  constructor or the string "Trace begun". Fixes GH #15, reported by Karen
  Etheridge.