This commit introduced an incompatible change in the asciidoct
API: both asciidoctorj-pdf and spring-asciidoctor-extensions
expect `org.asciidoctor.extension.JavaExtensionRegistry` to be
a class, not an interface.
This reverts commit 120ffb1ed0.
This commit introduced an incompatible change in the asciidoct
API: both asciidoctorj-pdf and spring-asciidoctor-extensions
expect `org.asciidoctor.extension.JavaExtensionRegistry` to be
a class, not an interface.
This reverts commit 120ffb1ed0.