Update dependency com.github.spotbugs:spotbugs to v4.2.1

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.github.spotbugs:spotbugs (source)	4.2.0 -> 4.2.1

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Release Notes

spotbugs/spotbugs

v4.2.1

Compare Source

Fixed

• Invalid HTML in the description of LI_LAZY_INIT_UPDATE_STATIC bug pattern (#​1383)
• NP_NONNULL_PARAM_VIOLATION false-positive in CompletableFuture.completedStage(value) (#​1397)

Changed

• Bump json from 2020051 to 2020111 (#​1384)

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