This is the third-party library FlyingSaucer that isn't available in the central maven repository.
'de.huxhorn.lilith:de.huxhorn.lilith.3rdparty.flyingsaucer.core-renderer:8RC1'
<dependency>
<groupId>de.huxhorn.lilith</groupId>
<artifactId>de.huxhorn.lilith.3rdparty.flyingsaucer.core-renderer</artifactId>
<version>8RC1</version>
</dependency>
<dependency org="de.huxhorn.lilith" name="de.huxhorn.lilith.3rdparty.flyingsaucer.core-renderer" rev="8RC1"/>
"de.huxhorn.lilith", "de.huxhorn.lilith.3rdparty.flyingsaucer.core-renderer", "8RC1"