chore(deps): update dependency io.vertx:vertx-web to v3.9.0 (#2524)
chore(deps): update dependency io.vertx:vertx-web to v3.9.0 (#2524)


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