From: terrafrost <terrafrost@gmail.com>
Date: Sat, 3 Apr 2021 17:13:19 -0500
Subject: fix broken unit test

Origin: upstream, https://github.com/phpseclib/phpseclib/commit/d70abb929005b419cd911cfd45738c2a1bfd6f50
---
 tests/Unit/Crypt/RSA/ModeTest.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/Unit/Crypt/RSA/ModeTest.php b/tests/Unit/Crypt/RSA/ModeTest.php
index 2763df2..854f908 100644
--- a/tests/Unit/Crypt/RSA/ModeTest.php
+++ b/tests/Unit/Crypt/RSA/ModeTest.php
@@ -6,6 +6,7 @@
  */
 
 use phpseclib\Crypt\RSA;
+use phpseclib\Math\BigInteger;
 
 class Unit_Crypt_RSA_ModeTest extends PhpseclibTestCase
 {