fixing linting error

Author: dvilaverde

client/auth.go

@@ -5,11 +5,11 @@ import (
 	"crypto/tls"
 	"encoding/binary"
 	"fmt"
-	"github.com/pingcap/tidb/pkg/parser/charset"
 
 	. "github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/packet"
 	"github.com/pingcap/errors"
+	"github.com/pingcap/tidb/pkg/parser/charset"
 )
 
 const defaultAuthPluginName = AUTH_NATIVE_PASSWORD