Change logs for cylc source package in Experimental

cylc (8.0~a1-1) experimental; urgency=medium

  * New upstream release, python3 port
    - Drop old patches
    - Closes: #936359, #885371
  * Move to pybuild build system

 -- Alastair McKinstry <email address hidden>  Tue, 24 Sep 2019 13:24:12 +0100