Bump hacking

hacking 3.0.x is too old. Bump it to the version currently used in
tempest repo.

Depends-on: https://review.opendev.org/c/openstack/tempest/+/906634
Change-Id: I01f9496e0fb66397916f8f8ce7543e3786f5d1dc
diff --git a/test-requirements.txt b/test-requirements.txt
index 0151f21..ebde755 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
-hacking>=3.2.0,<3.3.0 # Apache-2.0
+hacking>=6.1.0,<6.2.0 # Apache-2.0
 
 coverage>=4.4.1 # Apache-2.0
-flake8-import-order==0.12 # LGPLv3
+flake8-import-order>=0.18.0,<0.19.0 # LGPLv3
 python-subunit>=1.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0