Upgrade Gradle to 8.7 and fix deprecations

build.gradle

@@ -20,9 +20,11 @@
 import java.nio.file.Files
 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING
 
-apply plugin: "java"
-apply plugin: "distribution"
-apply plugin: "idea"
+plugins {
+  id 'java'
+  id 'distribution'
+  id 'idea'
+}
 
 group = 'org.logstash.filewatch'
 version file("JAR_VERSION").text.replaceAll("\\s","")
@@ -31,25 +33,17 @@ repositories {
     mavenCentral()
 }
 
-project.sourceCompatibility = JavaVersion.VERSION_1_8
-project.targetCompatibility = JavaVersion.VERSION_1_8
+java {
+  sourceCompatibility = JavaVersion.VERSION_1_8
+  targetCompatibility = JavaVersion.VERSION_1_8
+  withSourcesJar()
+  withJavadocJar()
+}
 
 dependencies {
     compileOnly group: 'org.jruby', name: 'jruby-complete', version: "9.1.13.0"
 }
 
-task sourcesJar(type: Jar, dependsOn: classes) {
-    from sourceSets.main.allSource
-    classifier 'sources'
-    archiveExtension = 'jar'
-}
-
-task javadocJar(type: Jar, dependsOn: javadoc) {
-    from javadoc.destinationDir
-    classifier 'javadoc'
-    archiveExtension = 'jar'
-}
-
 task copyGemjar(type: Copy, dependsOn: sourcesJar) {
     from project.jar
     into project.file('lib/jars/')

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists