upgrade gradle to 8.13, thanks @karussell

Author: westnordost

generator/build.gradle

@@ -9,8 +9,8 @@ tasks.register('fatJar', Jar) {
     manifest {
         attributes "Main-Class": "$mainClassName"
     }
-    baseName = project.name + "-all"
-    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+    archiveBaseName.set("${project.name}-all")
+    from { configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
     with jar
 }
 

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,5 @@
-#Sun Jul 10 18:00:54 CEST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists