GH-91 - General build plugin updates.

AsciidoctorJ 2.5.7.

Author: odrotbohm

pom.xml

@@ -281,7 +281,7 @@ limitations under the License.
 								<dependency>
 									<groupId>org.asciidoctor</groupId>
 									<artifactId>asciidoctorj</artifactId>
-									<version>2.5.3</version>
+									<version>2.5.7</version>
 								</dependency>
 								<dependency>
 									<groupId>org.asciidoctor</groupId>