add fat jar

wrapper/build.gradle.kts

@@ -14,3 +14,18 @@ dependencies {
     // use JUnit test framework
     testImplementation("junit:junit:4.12")
 }
+
+tasks {
+    jar {
+        from(
+            configurations.compileClasspath
+                .map { config ->
+                    config.map { if (it.isDirectory) it else zipTree(it) }
+                }
+        )
+
+        manifest {
+            attributes("Implementation-Title" to "wedroid-wrapper")
+        }
+    }
+}