Update dependency altgraph to v0.17.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
altgraph (source)	==0.16.1 -> ==0.17.4

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Release Notes

ronaldoussoren/altgraph (altgraph)

v0.17.4

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v0.17.3

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v0.17.2

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v0.17.1

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v0.17

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Configuration

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