Upgrade plexus-io to 3.1.1

Closes #108, Closes #105

Author: plamentotev

pom.xml

@@ -62,7 +62,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-io</artifactId>
-      <version>3.1.0</version>
+      <version>3.1.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>