* add depguard rule for ioutil * replace ioutil.ReadDir with os.ReadDir * use legacy option in depguard supported in golangci-lint v1.40 * replace ioutil.ReadDir with os.ReadDir * return error for file info
* replace ioutil.ReadFile -> os.ReadFile * replace ioutil.ReadAll -> io.ReadAll * replace ioutil.TempFile -> os.CreateTemp * replace ioutil.NopCloser -> io.NopCloser * replace ioutil.WriteFile -> os.WriteFile * replace ioutil.TempDir -> os.MkdirTemp * replace ioutil.Discard -> io.Discard