Log Message:
py-ipython: updated to 7.26.0

IPython 7.26
============

IPython 7.26 is a minor release that fixes a couple of issues, updates in API
and Copyright/Licenses issues around various part of the codebase.

We'll highlight `this issue <https://github.com/ipython/ipython/issues/13039>`
pointing out we were including and refereeing to code from Stack Overflow which
was CC-BY-SA, hence incompatible with the BSD license of IPython. This lead us
to a rewriting of the corresponding logic which in our case was done in a more
efficient way (in our case we were searching string prefixes instead of full
strings).

You will notice also a number of documentation improvements and cleanup.

Of particular interest are the following Pull-requests:

 - The IPython directive now uses Sphinx logging for warnings. :ghpull:`13030`.
 - Add expiry days option to pastebin magic and change http protocol to https.
   :ghpull:`13056`
 - Make Ipython.utils.timing work with jupyterlite :ghpull:`13050`.