Log Message:
py-blinker: update to 1.8.0.

Version 1.8.0
-------------

Released 2024-04-27

-   Deprecate the ``__version__`` attribute. Use feature detection, or
    ``importlib.metadata.version("blinker")``, instead. :issue:`128`
-   Specify that the deprecated ``temporarily_connected_to`` will be removed in
    the next version.
-   Show a deprecation warning for the deprecated global ``receiver_connected``
    signal and specify that it will be removed in the next version.
-   Show a deprecation warning for the deprecated ``WeakNamespace`` and specify
    that it will be removed in the next version.
-   Greatly simplify how the library uses weakrefs. This is a significant change
    internally but should not affect any public API. :pr:`144`
-   Expose the namespace used by ``signal()`` as ``default_namespace``.
    :pr:`145`