Log Message:
py-ipython: updated to 7.19.0

IPython 7.19 accumulative two month of works, bug fixes and improvements, there
was exceptionally no release last month.

- Fix to restore the ability to specify more than one extension using command
  line flags when using traitlets 5.0
- Docs docs formatting that make the install commands work on zsh
- Always display the last frame in tracebacks even if hidden with
  ``__traceback_hide__``
- Avoid an issue where a callback can be registered multiple times.
- Avoid an issue in debugger mode where frames changes could be lost.
- Never hide the frames that invoke a debugger, even if marked as hidden by
  ``__traceback_hide__``
- Fix calling the debugger in a recursive manner