Upgrade Maven plugins

Author: joschi

pom.xml

@@ -1,5 +1,8 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+    <prerequisites>
+        <maven>3.0.1</maven>
+    </prerequisites>
 
     <parent>
         <groupId>org.sonatype.oss</groupId>
@@ -110,7 +113,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>3.3</version>
                 <configuration>
                     <source>1.6</source>
                     <target>1.6</target>
@@ -119,7 +122,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>2.3</version>
+                <version>2.4</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -132,7 +135,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.9.1</version>
+                <version>2.10.3</version>
                 <executions>
                     <execution>
                         <id>attach-javadocs</id>
@@ -194,7 +197,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.5</version>
+                        <version>1.6</version>
                         <configuration>
                             <keyname>B1606F22</keyname>
                         </configuration>