Upgrade the minimum required Java version to Java 7

plamentotev · michael-o · commit e40aebc4226a · 2017-05-25T21:16:52.000+02:00
diff --git a/pom.xml b/pom.xml
@@ -166,8 +166,8 @@
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.7</source>
+          <target>1.7</target>
         </configuration>
       </plugin>
     </plugins>
