Updated spotbugs and fixed all the warnings.

apache / datasketches-memory

High performance native memory access for Java.

https://datasketches.apache.org

Apache License 2.0

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Updated spotbugs and fixed all the warnings. #182

Closed leerho closed 3 months ago

leerho commented 3 months ago

This is for a bug fix release 2.2.1. However, because the new version of SpotBugs found new warnings, I wanted to fix those issues as well. I also upgraded Maven plugins in POM to their more recent versions.