Merge pull request #493 from line/renovate/org.apache.maven.plugins-maven-jar-plugin-2.x

Update dependency org.apache.maven.plugins:maven-jar-plugin to v2.6

Author: renovate[bot]

generator/pom.xml

@@ -49,7 +49,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>2.2</version>
+                <version>2.6</version>
                 <executions>
                     <execution>
                         <goals>