refactor: use os instead of ioutil's ReadDir

Signed-off-by: Kally Fox <kallydev@gmail.com>

cmd/helm/dependency_update_test.go

@@ -17,7 +17,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -188,7 +187,7 @@ func TestDependencyUpdateCmd_DoNotDeleteOldChartsOnError(t *testing.T) {
 	}
 
 	// Make sure charts dir still has dependencies
-	files, err := ioutil.ReadDir(filepath.Join(dir(chartname), "charts"))
+	files, err := os.ReadDir(filepath.Join(dir(chartname), "charts"))
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/helm/search_repo.go

@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -340,7 +341,7 @@ func compListCharts(toComplete string, includeFiles bool) ([]string, cobra.Shell
 	//    listing the entire content of the current directory which will
 	//    be too many choices for the user to find the real repos)
 	if includeFiles && len(completions) > 0 && len(toComplete) > 0 {
-		if files, err := ioutil.ReadDir("."); err == nil {
+		if files, err := os.ReadDir("."); err == nil {
 			for _, file := range files {
 				if strings.HasPrefix(file.Name(), toComplete) {
 					// We are completing a file prefix

internal/third_party/dep/fs/fs.go

@@ -33,7 +33,6 @@ package fs
 
 import (
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -119,7 +118,7 @@ func CopyDir(src, dst string) error {
 		return errors.Wrapf(err, "cannot mkdir %s", dst)
 	}
 
-	entries, err := ioutil.ReadDir(src)
+	entries, err := os.ReadDir(src)
 	if err != nil {
 		return errors.Wrapf(err, "cannot read directory %s", dst)
 	}

pkg/action/lint.go

@@ -96,7 +96,7 @@ func lintChart(path string, vals map[string]interface{}, namespace string, stric
 			return linter, errors.Wrap(err, "unable to extract tarball")
 		}
 
-		files, err := ioutil.ReadDir(tempDir)
+		files, err := os.ReadDir(tempDir)
 		if err != nil {
 			return linter, errors.Wrapf(err, "unable to read temporary output directory %s", tempDir)
 		}

pkg/downloader/manager.go

@@ -870,7 +870,7 @@ func tarFromLocalDir(chartpath, name, repo, version string) (string, error) {
 
 // move files from tmppath to destpath
 func move(tmpPath, destPath string) error {
-	files, _ := ioutil.ReadDir(tmpPath)
+	files, _ := os.ReadDir(tmpPath)
 	for _, file := range files {
 		filename := file.Name()
 		tmpfile := filepath.Join(tmpPath, filename)