Suppress default method warnings for JarPath (#1263)

* Try to override defaults

* Revert "Try to override defaults"

This reverts commit d9b7374.

* Suppress `JavaDefaultMethodsNotOverriddenByDelegation`

Author: Goooler

src/functionalTest/kotlin/com/github/jengelman/gradle/plugins/shadow/util/JarPath.kt

@@ -13,6 +13,7 @@ import java.util.zip.ZipFile
  * We must declare some functions like [kotlin.io.path.deleteExisting] explicitly as they could not
  * be delegated to [JarPath] type.
  */
+@Suppress("JavaDefaultMethodsNotOverriddenByDelegation")
 class JarPath(val path: Path) :
   JarFile(path.toFile()),
   Path by path {