Updated POM versions

pom.xml

@@ -71,8 +71,8 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <distribution.format>zip</distribution.format>
-        <version.jackson>2.4.3</version.jackson>
-        <version.slf4j>1.7.7</version.slf4j>
+        <version.jackson>2.4.4</version.jackson>
+        <version.slf4j>1.7.9</version.slf4j>
     </properties>
 
     <dependencies>
@@ -85,7 +85,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>4.12</version>
             <scope>test</scope>
         </dependency>
         <!--JSON-->
@@ -154,8 +154,6 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.1</version>
                 <configuration>
-                    <source>1.6</source>
-                    <target>1.6</target>
                     <failOnError>true</failOnError>
                     <verbose>true</verbose>
                     <!-- excludes><exclude>**/*</exclude></excludes -->
@@ -181,7 +179,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.16</version>
+                <version>2.18</version>
                 <configuration>
                     <!-- To skip tests by default -->
                     <skipTests>${skipTests}</skipTests>
@@ -290,7 +288,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>1.4</version>
+                <version>1.5</version>
             </plugin>
 
             <plugin>