build: updated Gradle, enabled configuration cache

Author: osiegmar

gradle.properties

@@ -1,2 +1,3 @@
 org.gradle.jvmargs=-Dfile.encoding=UTF-8
 org.gradle.warning.mode=all
+org.gradle.configuration-cache=true

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-rc-1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

lib/build.gradle.kts

@@ -48,6 +48,13 @@ tasks.javadoc {
     options.jFlags = listOf("-Duser.language=en", "-Duser.country=US")
 }
 
+// Workaround for Gradle 9 support of Bnd https://github.com/bndtools/bnd/issues/6346
+tasks.jar {
+    bundle {
+        properties.put("project.group", provider { project.group })
+    }
+}
+
 sourceSets {
     create("common") {
         compileClasspath += sourceSets.main.get().output