updates plugin versions

Author: brianburton

pom.xml

@@ -116,7 +116,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
-                        <version>2.2.1</version>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <id>attach-sources</id>
@@ -129,7 +129,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>2.9.1</version>
+                        <version>2.10.4</version>
                         <configuration>
                             <additionalparam>-Xdoclint:none</additionalparam>
                         </configuration>
@@ -145,7 +145,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.4</version>
+                        <version>1.6</version>
                         <executions>
                             <execution>
                                 <id>sign-artifacts</id>