Log Message:
py-prompt_toolkit: updated to 3.0.19

3.0.19:

Fixes:
- Make the flush method of the vt100 output implementation re-entrant (fixes an
  issue when using aiogevent).
- Fix off-by-one in `FormattedTextControl` mouse logic.
- Run `print_container` always in a thread (avoid interfering with possible
  event loop).
- Make sphinx autodoc generation platform agnostic (don't import Windows stuff
  when generating Sphinx docs).