replace deprecated package

Author: yu-croco

compiler/src/dotty/tools/io/Jar.scala

@@ -9,7 +9,7 @@ package io
 
 import java.io.{ InputStream, OutputStream, DataOutputStream }
 import java.util.jar._
-import scala.collection.JavaConverters._
+import scala.jdk.CollectionConverters._
 import scala.collection.mutable
 import Attributes.Name
 import scala.language.postfixOps

compiler/src/dotty/tools/io/JarArchive.scala

@@ -2,7 +2,7 @@ package dotty.tools.io
 
 import java.nio.file.{FileSystemAlreadyExistsException, FileSystems}
 
-import scala.collection.JavaConverters._
+import scala.jdk.CollectionConverters._
 
 /**
  * This class implements an [[AbstractFile]] backed by a jar

compiler/src/dotty/tools/io/Path.scala

@@ -10,9 +10,7 @@ import java.nio.file._
 import java.net.{URI, URL}
 import java.nio.file.attribute.{BasicFileAttributes, FileTime}
 import java.io.IOException
-
-import scala.collection.JavaConverters._
-
+import scala.jdk.CollectionConverters._
 import scala.util.Random.alphanumeric
 
 /** An abstraction for filesystem paths.  The differences between