chore: replace deprecated ioutil.TempDir with os.MkdirTemp (#506)

docker/pkg/ioutils/temp_unix.go

@@ -8,7 +8,7 @@ package ioutils // import "github.com/ory/dockertest/v3/docker/pkg/ioutils"
 
 import "os"
 
-// TempDir on Unix systems is equivalent to ioutil.TempDir.
+// TempDir on Unix systems is equivalent to os.MkdirTemp.
 func TempDir(dir, prefix string) (string, error) {
 	return os.MkdirTemp(dir, prefix)
 }

docker/pkg/ioutils/temp_windows.go

@@ -4,14 +4,14 @@
 package ioutils // import "github.com/ory/dockertest/v3/docker/pkg/ioutils"
 
 import (
-	"io/ioutil"
+	"os"
 
 	"github.com/ory/dockertest/v3/docker/pkg/longpath"
 )
 
-// TempDir is the equivalent of ioutil.TempDir, except that the result is in Windows longpath format.
+// TempDir is the equivalent of os.MkdirTemp, except that the result is in Windows longpath format.
 func TempDir(dir, prefix string) (string, error) {
-	tempDir, err := ioutil.TempDir(dir, prefix)
+	tempDir, err := os.MkdirTemp(dir, prefix)
 	if err != nil {
 		return "", err
 	}

docker/pkg/system/filesys_windows.go

@@ -264,7 +264,7 @@ func nextSuffix() string {
 	return strconv.Itoa(int(1e9 + r%1e9))[1:]
 }
 
-// TempFileSequential is a copy of ioutil.TempFile, modified to use sequential
+// TempFileSequential is a copy of os.CreateTemp, modified to use sequential
 // file access. Below is the original comment from golang:
 // TempFile creates a new temporary file in the directory dir
 // with a name beginning with prefix, opens the file for reading