chore(deps): update dependency io.vertx:vertx-unit to v3.8.4 (#1858)
chore(deps): update dependency io.vertx:vertx-unit to v3.8.4 (#1858)


GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples