Update build plugins and Javadoc link.
Update build plugins and Javadoc link.

maven-pmd-plugin 3.12.0 -> 3.13.0.
maven-checkstyle-plugin -> 3.1.0 -> 3.1.1.
jacoco 0.8.4 -> 0.8.5.
commons.javadoc.version -> 3.1.0 -> 3.1.1.
commons.japicmp.version -> 0.14.1 -> 0.14.3.
ommons.surefire.version 3.0.0-M3 -> 3.0.0-M4.
Link to Java 8 Javadoc.

MarkDacek/commons-lang,britter/commons-lang,MarkDacek/commons-lang,apache/commons-lang,apache/commons-lang,MarkDacek/commons-lang,apache/commons-lang,britter/commons-lang,britter/commons-lang