Log Message:
py-numexpr: update to 2.8.1.

Changes from 2.8.0 to 2.8.1
---------------------------

* Fixed dependency list.
* Added ``pyproject.toml`` and modernize the ``setup.py`` script. Thanks to
Antonio Valentino for the PR.

Changes from 2.7.3 to 2.8.0
---------------------------

* Wheels for Python 3.10 are now provided.
* Support for Python 2.7 and 3.5 has been discontinued.
* All residual support for Python 2.X syntax has been removed, and therefore
  the setup build no longer makes calls to the `2to3` script. The `setup.py`
  has been refactored to be more modern.
* The examples on how to link into Intel VML/MKL/oneAPI now use the dynamic
  library.