bump Maven plugins
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
- <version>3.5</version>
+ <version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
- <version>3.0.0</version>
+ <version>3.1.1</version>
<configuration>
<aggregate>true</aggregate>
<source>1.8</source>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
- <version>2.1.2</version>
+ <version>3.1.0</version>
<executions>
<execution>
<id>attach-sources</id>
