Merge pull request #14 from GoogleCloudPlatform/tswast-versionsplugin

Add versions plugin.

Author: tswast

pom.xml

@@ -75,6 +75,11 @@ limitations under the License.
           <execution><goals><goal>check</goal></goals></execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>versions-maven-plugin</artifactId>
+        <version>2.2</version>
+      </plugin>
       <plugin>
         <groupId>org.jacoco</groupId>
         <artifactId>jacoco-maven-plugin</artifactId>