v13.0 Branch Preparation

Pins version of Flake8
Updates requirements to point to branch

Change-Id: I2e2a79cf8ef8ed211b74cb5baef6ef5c8c79f22d
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/tox.ini b/tox.ini
index 7489f16..4844552 100644
--- a/tox.ini
+++ b/tox.ini
@@ -55,7 +55,7 @@
 
 #######################################################################################
 [testenv:flake8]
-deps = flake8
+deps = flake8==5.0.4
 commands =
         flake8 osm_mon/ setup.py