Update forbiddenApis to version 2.6. This mainly adds support for Java 11 class files/signatures and silences the commons-io warnings for modules that don't use commons-io
<groupId>de.thetaphi</groupId>
<artifactId>forbiddenapis</artifactId>
<!-- if this version contains commons-io 2.6, remove hard-coded commons-io version below -->
- <version>2.5</version>
+ <version>2.6</version>
<configuration>
<targetVersion>${maven.compiler.target}</targetVersion>
<failOnUnresolvableSignatures>false</failOnUnresolvableSignatures>
