fix(deps): update dependency nl.jqno.equalsverifier:equalsverifier to v3.15.4

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nl.jqno.equalsverifier:equalsverifier (source)	3.15.3 -> 3.15.4

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Release Notes

jqno/equalsverifier (nl.jqno.equalsverifier:equalsverifier)

v3.15.4

Added

• A check for Scala with its -Xcheckinit flag switched on. This flag generates a field that should have been marked as synthetic, but isn't, so EqualsVerifier has to check for this field explicitly.

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