migrate away from deprecated ioutil APIs (#7175)

Co-authored-by: Callum Waters <cmwaters19@gmail.com>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

libs/cli/helper.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -19,7 +18,7 @@ func WriteConfigVals(dir string, vals map[string]string) error {
 		data += fmt.Sprintf("%s = \"%s\"\n", k, v)
 	}
 	cfile := filepath.Join(dir, "config.toml")
-	return ioutil.WriteFile(cfile, []byte(data), 0600)
+	return os.WriteFile(cfile, []byte(data), 0600)
 }
 
 // RunWithArgs executes the given command with the specified command line args

libs/cli/setup_test.go

@@ -2,7 +2,7 @@ package cli
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 	"testing"
@@ -55,7 +55,7 @@ func TestSetupEnv(t *testing.T) {
 }
 
 func tempDir() string {
-	cdir, err := ioutil.TempDir("", "test-cli")
+	cdir, err := os.MkdirTemp("", "test-cli")
 	if err != nil {
 		panic(err)
 	}