Log Message:
py-prompt_toolkit2: updated to 3.0.6

3.0.6:

New features:
- The SSH/Telnet adaptors have been refactored and improved in several ways.
  * Handle terminal types for both telnet and SSH sessions.
  * Added pipe input abstraction. (base class for `PosixPipeInput` and
    `Win32PipeInput`).
  * The color depth logic has been refactored and moved to the `Output`
    implementations. Added `get_default_color_depth` method to `Output`
    objects.
  * All line feets are now preceded by a carriage return in the telnet
    connection stdout.
- Introduce `REPLACE_SINGLE` input mode for Vi key bindings.
- Improvements to the checkbox implementation:
    * Hide the scrollbar for a single checkbox.
    * Added a "checked" setter to the checkbox.
- Expose `KeyPressEvent` in key_binding/__init__.py (often used in type
  annotations).
- The renderer has been optimized so that no trailing spaces are generated
  (this improves copying in some terminals).

Fixes:
- Ignore F21..F24 key bindings by default.
- Fix auto_suggest key bindings when suggestion text is empty.
- Bugfix in SIGWINCH handling.
- Handle bug in HSplit/VSplit when the number of children is zero.
- Bugfix in CPR handling in renderer. Proper cancellation of pending tasks.
- Ensure rprompt aligns with input.
- Use `sys.stdin.encoding` for decoding stdin stream.