chore(deps): update dependency blinker to v1.8.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
blinker	==1.7.0 -> ==1.8.0

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Release Notes

pallets-eco/blinker (blinker)

v1.8.0

Compare Source

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

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