update maven plugins

as per `mvn versions:display-plugin-updates`

pom.xml

@@ -398,17 +398,17 @@
 
 				<plugin>
 					<artifactId>maven-clean-plugin</artifactId>
-					<version>2.5</version>
+					<version>2.6.1</version>
 				</plugin>
 
 				<plugin>
 					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.1</version>
+					<version>3.3</version>
 				</plugin>
 
 				<plugin>
 					<artifactId>maven-deploy-plugin</artifactId>
-					<version>2.8.1</version>
+					<version>2.8.2</version>
 				</plugin>
 
 				<plugin>
@@ -423,17 +423,17 @@
 
 				<plugin>
 					<artifactId>maven-install-plugin</artifactId>
-					<version>2.5.1</version>
+					<version>2.5.2</version>
 				</plugin>
 
 				<plugin>
 					<artifactId>maven-jar-plugin</artifactId>
-					<version>2.5</version>
+					<version>2.6</version>
 				</plugin>
 
 				<plugin>
 					<artifactId>maven-resources-plugin</artifactId>
-					<version>2.6</version>
+					<version>2.7</version>
 				</plugin>
 
 				<plugin>
@@ -458,12 +458,12 @@
 
 				<plugin>
 					<artifactId>maven-source-plugin</artifactId>
-					<version>2.3</version>
+					<version>2.4</version>
 				</plugin>
 
 				<plugin>
 					<artifactId>maven-surefire-plugin</artifactId>
-					<version>2.17</version>
+					<version>2.18.1</version>
 				</plugin>
 
 				<plugin>