Log Message:
khal: update to 0.11.1.

0.11.1
======
2023-04-23

* FIX README.rst formatting to allow upload to PyPI

0.11.0
======
2023-04-23

* DROPPED support for python versions < 3.8
* UPDATED REQUIREMENT pytz is now required >= 2018.7
* NEW test REQUIREMENT: packaging
* FIX support in tests for pytz version numbers of the format year.month.minor
* FIX deleting of instances of recurring events in ikhal
* FIX if a `discover` collection is set to "readonly", discovered \ 
collections
  will now inherit the readonly property
* FIX ikhal will not wrap date headers into the next line in narrow terminals
* FIX `configure` should only suggest valid default collection names
* NEW the `configure` command can now set up vdirsyncer
* NEW better error message for misuses of `at` and `list`
* NEW `discover` collection type now supports `**` (arbitrary depths)
* NEW Add testing for Python 3.11