chore(main): release 6.42.0

[release-please]

🤖 I have created a release beep boop

6.42.0 (2023-05-15)

Features

• Add support for UpdateDatabase in Cloud Spanner (#2265) (2ea06e7)
• Add support for UpdateDatabase in Cloud Spanner (#2429) (09f20bd)

Bug Fixes

• Add error details for INTERNAL error (#2413) (ed62aa6)
• Use javax.annotation.Nonnull in executor framework (#2414) (afcc598)

Dependencies

• Update dependency com.google.cloud:google-cloud-monitoring to v3.18.0 (#2426) (05a45f8)
• Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.9.0 (#2427) (42dbfe3)
• Update dependency com.google.cloud:google-cloud-trace to v2.17.0 (#2428) (6f7fee8)
• Update dependency org.graalvm.buildtools:junit-platform-native to v0.9.22 (#2423) (679bb36)
• Update dependency org.graalvm.buildtools:native-maven-plugin to v0.9.22 (#2424) (a72f4ff)
• Update dependency org.graalvm.sdk:graal-sdk to v22.3.2 (#2391) (c082a1f)

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🤖 Release is at https://github.com/googleapis/java-spanner/releases/tag/v6.42.0 🌻

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Triggered job: cloud-devrel/client-libraries/java/java-spanner/release/stage (2023-05-15T16:45:21.817Z)

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