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: I9cd68111a35ca97af014cdd77fee10614a4c0d5b
diff --git a/test-requirements.txt b/test-requirements.txt
index 761bf70..1a63b32 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,9 +1,8 @@
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=6.1.0,<6.2.0 # Apache-2.0
 
 coverage>=4.4.1 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
-# releasenotes
-flake8-import-order
+flake8-import-order>=0.18.0,<0.19.0 # LGPLv3