[rkscript] Fix warning: `IPython.kernel` package has been deprecated
[rkscript] Fix warning: `IPython.kernel` package has been deprecated

UserWarning: The `IPython.kernel` package has been deprecated.
You should import from ipykernel or jupyter_client instead.
scripts/rkscript: add support for jupyter notebooks ver. 3.1.0 and 4.0.0

korniichuk/rk