message: java: Use maven profile to target Java 8 bytecode
diff: </distributionManagement>
  <build>
  <sourceDirectory>java</sourceDirectory>
  + </build>
  + <profiles>
  + <profile>
  + <id>jdk9</id>
  + <activation>
  + <jdk>[1.9,)</jdk>
  + </activation>
  + <build>
  <plugins>
  <plugin>
  <artifactId>maven-compiler-plugin</artifactId>
  <configuration>
  - <source>1.8</source>
  - <target>1.8</target>
  + <release>8</release>
  </configuration>
  - <version>3.2</version>
  + <version>3.8.1</version>
  </plugin>
  <plugin>
  <artifactId>maven-surefire-plugin</artifactId>
  <include>**/*Test.java</include>
  </includes>
  </configuration>
  - <version>2.18.1</version>
  + <version>2.22.2</version>
  </plugin>
  <plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-source-plugin</artifactId>
  - <version>2.3</version>
  + <version>3.2.1</version>
  <executions>
  <execution>
  <id>attach-sources</id>
  <plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-javadoc-plugin</artifactId>
  - <version>2.9.1</version>
  + <version>3.3.0</version>
  <configuration>
  <additionalparam>-Xdoclint:none</additionalparam>
  <additionalOptions>-Xdoclint:none</additionalOptions>
  <plugin>
  <groupId>org.apache.felix</groupId>
  <artifactId>maven-bundle-plugin</artifactId>
  - <version>3.0.1</version>
  + <version>5.1.2</version>
  <extensions>true</extensions>
  </plugin>
  <plugin>
  <groupId>org.sonatype.plugins</groupId>
  <artifactId>nexus-staging-maven-plugin</artifactId>
  - <version>1.6.7</version>
  + <version>1.6.8</version>
  <extensions>true</extensions>
  <configuration>
  <serverId>ossrh</serverId>
  <plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-gpg-plugin</artifactId>
  - <version>1.6</version>
  + <version>3.0.1</version>
  <executions>
  <execution>
  <id>sign-artifacts</id>
  </plugin>
  </plugins>
  </build>
  + </profile>
  + </profiles>
  </project>
  