chore(deps): update dependency io.vertx:vertx-unit to v3.9.1 (GoogleCloudPlatform#2915)

Author: renovate-bot

appengine-java11/vertx-helloworld/pom.xml

@@ -68,7 +68,7 @@ limitations under the License.
  <dependency>
  <groupId>io.vertx</groupId>
  <artifactId>vertx-unit</artifactId>
- <version>3.9.0</version>
+ <version>3.9.1</version>
  </dependency>
  </dependencies>
  <build>