Log Message:
(cad/klayout) Updated 0.28.8 to 0.28.9

0.28.9           (2023-06-10):
* Enhancement: %GITHUB%/issues/1281 Layout diff can ignore shape or instance \ 
duplicates
* Bugfix: %GITHUB%/issues/1393 GDS2Text format not supported in Python module
* Bugfix: "add meta info" did not take "persisted" flag
* Enhancement: "profile" feature for DRC and LVS
* Enhancement: DRC can write to multiple targets now
  - new functions "new_report", "new_target": create output \ 
channel objects
    that can be used to redirect "output" to specific other channels
* Bugfix: GDS2 reader should not segfault on certain broken files
* Enhancement: performance improvement of hierarchical XOR in certain cases