Upgrade to CSS4J 3.8.0, CSS4J-DOM4J 3.8.0, Carte Util 3.6.0 & XML DTD 4.1.0

Currently using Upgrade to CSS4J 3.7.2, CSS4J-DOM4J 3.7.1, Carte Util 3.5.1 & XML DTD 4.0.0

See:

• https://github.com/css4j/css4j/releases/tag/v3.8.0
• https://github.com/css4j/css4j-dom4j/releases/tag/v3.8.0
• https://github.com/css4j/carte-util/releases/tag/v3.6.0
• https://github.com/css4j/xml-dtd/releases/tag/v4.1.0