Upgrade plugins

This fixes #8

Author: michael-o

pom.xml

@@ -38,24 +38,24 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.0.22</version>
+      <version>3.0.24</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-container-default</artifactId>
       <scope>test</scope>
-      <version>1.0-alpha-9-stable-1</version>
+      <version>1.0-alpha-30</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>
-      <version>3.0.0</version>
+      <version>3.0.2</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>commons-io</groupId>
       <artifactId>commons-io</artifactId>
-      <version>2.2</version>
+      <version>2.5</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>