update versions

pom.xml

@@ -139,7 +139,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-site-plugin</artifactId>
-						<version>3.4</version>
+						<version>3.5</version>
 						<configuration>
 							<reportPlugins>
 								<plugin>
@@ -164,7 +164,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.3</version>
+				<version>3.5.1</version>
 				<configuration>
 					<source>1.6</source>
 					<target>1.6</target>
@@ -176,7 +176,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-source-plugin</artifactId>
-				<version>2.4</version>
+				<version>3.0.0</version>
 				<executions>
 					<execution>
 						<id>attach-sources</id>
@@ -189,7 +189,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-release-plugin</artifactId>
-				<version>2.5.2</version>
+				<version>2.5.3</version>
 				<configuration>
 					<autoversionsubmodules>true</autoversionsubmodules>
 				</configuration>