Update Maven plugins

Author: joschi

pom.xml

@@ -113,7 +113,7 @@
             <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>
@@ -122,7 +122,7 @@
             <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>
@@ -148,7 +148,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.4</version>
+                <version>3.5.1</version>
                 <configuration>
                     <skipDeploy>true</skipDeploy>
                 </configuration>
@@ -175,7 +175,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.18.1</version>
+                <version>2.19.1</version>
             </plugin>
         </plugins>
     </build>