Latest version of com.itextpdf:sign
https://javadoc.io/doc/com.itextpdf/sign
Current version 7.1.18
https://javadoc.io/doc/com.itextpdf/sign/7.1.18
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/com.itextpdf/sign/7.1.18/package-list