Add tests for obfuscated2 clientside

cli/access.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
@@ -123,11 +122,11 @@ func (c *Access) getIP(protocol string) net.IP {
 	}
 
 	defer func() {
-		io.Copy(ioutil.Discard, resp.Body) // nolint: errcheck
+		io.Copy(io.Discard, resp.Body) // nolint: errcheck
 		resp.Body.Close()
 	}()
 
-	data, err := ioutil.ReadAll(resp.Body)
+	data, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil
 	}

cli/base.go

@@ -2,9 +2,9 @@ package cli
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/url"
+	"os"
 
 	"github.com/9seconds/mtg/v2/config"
 	"github.com/9seconds/mtg/v2/mtglib"
@@ -19,7 +19,7 @@ type base struct {
 }
 
 func (b *base) ReadConfig(version string) error {
-	content, err := ioutil.ReadFile(b.ConfigPath)
+	content, err := os.ReadFile(b.ConfigPath)
 	if err != nil {
 		return fmt.Errorf("cannot read config file: %w", err)
 	}