3.0.43

Fixes regression from 3.0.42:

• Fix regression on Pypy: Don't use ctypes.pythonapi to restore SIGINT if not available.

Other changes from 3.0.42:

• Fix line wrapping in patch_stdout on Windows.
• Make formatted_text.split_lines() accept an iterable instead of lists only.
• Disable the IPython workaround (from 3.0.41) for IPython >= 8.18.
• Restore signal.SIGINT handler between prompts