Attach sources and javadoc jar when deploying

build.gradle

@@ -37,11 +37,16 @@ processResources {
     }
 }
 
-tasks.withType(JavaCompile) {
-    options.encoding = "UTF-8"
-
+java {
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
+
+    withJavadocJar()
+    withSourcesJar()
+}
+
+tasks.withType(JavaCompile) {
+    options.encoding = "UTF-8"
 }
 
 shadowJar {