update dependencies, add hint when first running cookiecutter

cookiecutter.json

 {
+  "README of": "Cookiecutter template for relational RAG projects]\nPlease refer to <https://git-st.inf.tu-dresden.de/jastadd/project-templates/relast> for information on the parameters to follow\n[Continue with Enter",
   "repo_name": "test_repo",
   "project_name": "My New Relational RAG Project",
   "project_short_name": "NewRelAST",

{{cookiecutter.repo_name}}/build.gradle

 plugins {
+    id 'com.github.ben-manes.versions' version '0.42.0'
     id 'java'
     id 'application'
     id 'maven-publish'
@@ -26,8 +27,9 @@ repositories {
 }
 
 configurations {
-    // add a configuration to store the grammar printing dependency in
+    // add a configuration to store the dependencies of grammar printing and relast preprocessor library in
     grammar2uml
+    relast
 }
 
 File genSrc = file("src/gen/java")
@@ -35,9 +37,10 @@ idea.module.generatedSourceDirs += genSrc
 sourceSets.main.java.srcDir genSrc
 
 dependencies {
-    // uncomment if relast2uml should be used; this requires graphviz in CI and on system
-    // implementation group: 'de.tudresden.inf.st', name: 'dumpAstWithPlantuml', version: "${relast2uml_version}"
+    // uncomment if dumpAst should be used; this requires graphviz in CI and on system
+    // implementation group: 'de.tudresden.inf.st', name: 'dumpAst', version: "${dumpAst_version}"
     grammar2uml group: 'de.tudresden.inf.st', name: 'grammar2uml', version: "${grammar2uml_version}"
+    relast group: 'org.jastadd', name: 'relast', version: "${relast_version}"
     testImplementation group: 'org.assertj', name: 'assertj-core', version: "${assertj_version}"
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: "${jupyter_version}"
     testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: "${jupyter_version}"
@@ -83,7 +86,6 @@ jar {
     }
 }
 
-def relastJar = 'libs/relast.jar'
 def relastFiles = ['./src/main/jastadd/{{cookiecutter.project_short_name}}.relast']
 def grammarPrefix = './src/gen/jastadd/{{cookiecutter.project_short_name}}'
 def grammarDiagramFile = './src/gen/resources/{{cookiecutter.project_short_name}}Grammar.png'
@@ -92,8 +94,11 @@ def jastAddListName = 'JastAddList'
 task generateGrammarDiagrams(type: JavaExec) {
     group = 'Documentation'
     classpath = configurations.grammar2uml
+    mainClass = 'de.tudresden.inf.st.jastadd.grammar2uml.compiler.Compiler'
 
     args "--output=${grammarDiagramFile}", '--defaultFolders'
+    // TODO uncomment if using multiple grammar files
+    // args '--separateGrammarDiagrams=./src/gen/resources/*.png'
     args relastFiles
 
     inputs.files relastFiles
@@ -102,7 +107,13 @@ task generateGrammarDiagrams(type: JavaExec) {
 
 task relastToJastAdd(type: JavaExec) {
     group = 'Build'
-    classpath = files("${relastJar}")
+    classpath = configurations.relast
+    //noinspection GroovyAssignabilityCheck, GroovyAccessibility
+    mainClass = 'org.jastadd.relast.compiler.Compiler'
+
+    doFirst {
+        mkdir "src/gen/jastadd/"
+    }
 
     args "--grammarName=${grammarPrefix}",
             '--useJastAddNames',

{{cookiecutter.repo_name}}/gradle.properties

-relast2uml_version = 0.3.6-54
-jupyter_version = 5.8.2
-assertj_version = 3.22.0
-grammar2uml_version = 0.2.1
-jastaddgradle_version = 1.14.5
\ No newline at end of file
+dumpAst_version = 1.2.0
+jupyter_version = 5.9.0
+assertj_version = 3.23.1
+grammar2uml_version = 0.2.5-21
+jastaddgradle_version = 1.15.0
+relast_version = 0.4.0