refactor: move from io/ioutil to io and os packages (#1417)

The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.

[1]: https://golang.org/doc/go1.16#ioutil
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/common/file.go

@@ -48,9 +48,7 @@ func CopyDir(source string, dest string) (err error) {
 		return err
 	}
 
-	directory, _ := os.Open(source)
-
-	objects, err := directory.Readdir(-1)
+	objects, err := os.ReadDir(source)
 
 	for _, obj := range objects {
 		sourcefilepointer := source + "/" + obj.Name()