update jastaddgradle and jastaddd used in gradle plugin

build.gradle

@@ -91,6 +91,7 @@ dependencies {
 
     grammar2uml group: 'de.tudresden.inf.st', name: 'grammar2uml', version: "${grammar2uml_version}"
     relast group: 'org.jastadd', name: 'relast', version: "${relast_version}"
+    jastadd2 "org.jastadd:jastadd:2.3.5"
 
     api group: 'org.jastadd', name: 'jastadd', version: '2.3.5'
     api group: 'net.sf.beaver', name: 'beaver-rt', version: '0.9.11'

gradle.properties

@@ -3,4 +3,4 @@ relast2uml_version = 0.3.7-59
 jupyter_version = 5.8.2
 assertj_version = 3.22.0
 grammar2uml_version = 0.2.1
-jastaddgradle_version = 1.14.5
+jastaddgradle_version = 1.15.0