[MASSEMBLY-859] Upgrade to Plexus IO 3.0.0

This closes #117

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1799189 13f79535-47bb-0310-9956-ffa450edef68

Author: michael-o

maven-assembly-plugin/pom.xml

@@ -157,7 +157,7 @@ under the License.
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-io</artifactId>
-      <version>2.7.1</version>
+      <version>3.0.0</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>