troubleshoot gradle-plugin failures on CI release job

gradle/published-java-module.gradle

@@ -107,3 +107,17 @@ task ciBuild( dependsOn: [test, publish] )
 task release(dependsOn: [test, publishToSonatype])
 publishToSonatype.mustRunAfter test
 
+
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Ancillary tasks
+
+task showPublications {
+	doFirst {
+		project.publishing.publications.each { publication ->
+			println "Publication (${publication.name}): ${publication.groupId}:${publication.artifactId}:${publication.version}"
+			publication.artifacts.each { artifact ->
+				println "    > ${artifact}"
+			}
+		}
+	}
+}

tooling/hibernate-gradle-plugin/hibernate-gradle-plugin.gradle

@@ -9,7 +9,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 
 plugins {
 	id 'java-gradle-plugin'
-	id 'com.gradle.plugin-publish' version '0.14.0'
+	id 'com.gradle.plugin-publish' version '0.16.0'
 
 	id 'com.github.sebersole.testkit-junit5' version '1.2.0'
 }