Unpin isort version and make needed changes

Signed-off-by: Tim Lane <[email protected]>

Author: Tim Lane

test/unit/test_dcv_authenticator.py

@@ -15,7 +15,6 @@
 from datetime import datetime
 
 import pytest
-
 from assertpy import assert_that
 from pcluster_dcv_authenticator import (
     DCVAuthenticator,

tox.ini

@@ -52,10 +52,10 @@ commands =
 basepython = python3
 skip_install = true
 deps =
-    isort==4.3.21
+    isort
     seed-isort-config
 commands =
-    isort -rc -w 120 \
+    isort -w 120 \
     {[vars]code_dirs} \
     {posargs}