Included 'cryptography' library in test requirements. It's used in
Docker to connect to MySQL using PyMySQL.
@@ -36,6 +36,7 @@ testing_requires = (
"redis<=3.2.99999",
"celery<=4.3.99999",
"pymysql<=0.9.99999",
+ "cryptography",
"thespian<=3.9.99999",
# Tests use Django with PostgreSQL.
"psycopg2cffi<=2.8.99999" if is_pypy else "psycopg2-binary<=2.7.99999",
