[codex] Update Java build dependencies

[fabian-barney]

Closes #91

Summary

• updates stable Maven build/test/publishing plugin versions
• updates JUnit, Jackson, Error Prone, and NullAway patch/major versions within supported Java 17 consumer floor
• keeps the published Java runtime floor unchanged

Validation

• mvn -B verify -Dcentral.skipPublishing=true
• gradle-plugin/gradlew.bat check

[Copilot]

Pull request overview

Dependency update sweep across the Maven parent build and plugin modules, aiming to refresh build/publish tooling and core test/framework libraries while keeping the Java 17 consumer floor.

Changes:

• Updated parent POM-managed versions for JUnit, Jackson, Error Prone, NullAway, and several Maven plugins.
• Updated Maven plugin module’s Maven API/tooling dependencies and invoker/plugin tooling versions.
• Updated Gradle plugin module’s JUnit BOM version used for tests.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
pom.xml	Bumps centrally managed dependency/plugin versions (JUnit/Jackson/Error Prone/NullAway + Maven pluginManagement versions).
maven-plugin/pom.xml	Updates Maven plugin API/core/tooling dependency versions and build plugin versions for the Maven plugin module.
gradle-plugin/build.gradle.kts	Updates the Gradle plugin module’s test JUnit BOM version.

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated no new comments.