GH-458 - Upgrade build plugins.

pom.xml

@@ -47,17 +47,17 @@
 					<plugin>
 						<groupId>org.asciidoctor</groupId>
 						<artifactId>asciidoctor-maven-plugin</artifactId>
-						<version>2.2.4</version>
+						<version>3.0.0</version>
 						<dependencies>
 							<dependency>
 								<groupId>org.asciidoctor</groupId>
 								<artifactId>asciidoctorj</artifactId>
-								<version>2.5.10</version>
+								<version>3.0.0</version>
 							</dependency>
 							<dependency>
 								<groupId>org.asciidoctor</groupId>
 								<artifactId>asciidoctorj-diagram</artifactId>
-								<version>2.2.11</version>
+								<version>2.3.1</version>
 							</dependency>
 							<dependency>
 								<groupId>io.spring.asciidoctor.backends</groupId>
@@ -389,7 +389,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-release-plugin</artifactId>
-				<version>3.0.1</version>
+				<version>3.1.1</version>
 				<configuration>
 					<pushChanges>false</pushChanges>
 					<scmCommentPrefix />