Fix forbiddenapis failure with GraalVM 21

build.gradle

@@ -12,7 +12,7 @@ buildscript {
 
 	dependencies {
 //		classpath 'org.asciidoctor:asciidoctor-gradle-plugin:1.5.7'
-		classpath 'de.thetaphi:forbiddenapis:3.2'
+		classpath buildscriptLibs.forbiddenapis
 		classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.1'
 	}
 }

gradle/java-module.gradle

@@ -14,7 +14,7 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'de.thetaphi:forbiddenapis:3.7'
+		classpath buildscriptLibs.forbiddenapis
 	}
 }
 

settings.gradle

@@ -277,6 +277,11 @@ dependencyResolutionManagement {
             library( "mavenPlugin", "org.apache.maven", "maven-plugin-api" ).versionRef( mavenVersion )
             library( "mavenPluginTools", "org.apache.maven.plugin-tools", "maven-plugin-annotations" ).versionRef( mavenPluginToolsVersion )
         }
+        buildscriptLibs {
+            def forbiddenapisversion = version "forbiddenapis", "3.7"
+
+            library( "forbiddenapis", "de.thetaphi", "forbiddenapis" ).versionRef( forbiddenapisversion )
+        }
     }
 }