RenovateBot: Update dependency blinker to v1.5

This MR contains the following updates:

Package	Update	Change
blinker (source)	minor	==1.4 -> ==1.5

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Release Notes

pallets-eco/blinker

v1.5

Released 2022-07-17

• Support Python >= 3.7 and PyPy. Python 2, Python < 3.7, and Jython may continue to work, but the next release will make incompatible changes.

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Configuration

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