refactor: move from io/ioutil to io and os package

The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

cmd/framework.go

@@ -4,7 +4,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -56,7 +55,7 @@ var frameworkCmd = &cobra.Command{
 			if len(args[1:]) == 0 || args[1] != "-" {
 				scanInfo.InputPatterns = args[1:]
 			} else { // store stout to file
-				tempFile, err := ioutil.TempFile(".", "tmp-kubescape*.yaml")
+				tempFile, err := os.CreateTemp(".", "tmp-kubescape*.yaml")
 				if err != nil {
 					return err
 				}

cmd/version.go

@@ -3,7 +3,7 @@ package cmd
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	"github.com/spf13/cobra"
@@ -32,7 +32,7 @@ func GetLatestVersion() (string, error) {
 		return "", fmt.Errorf("failed to download file, status code: %s", resp.Status)
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return "", fmt.Errorf("failed to read response body from '%s', reason: %s", latestVersion, err.Error())
 	}