remove msgpack pin (#818)

prometheanfire · web-flow · commit cc41e290f690 · 2020-04-11T18:49:33.000-05:00
The hard lock prevents this from being co-installed with many other
packages.  For instance, it's preventing it from being included in
openstack (which is on 0.6.2 and working on 1.0.0 now).

Signed-off-by: Matthew Thode &lt;mthode@mthode.org&gt;
diff --git a/requirements.txt b/requirements.txt
@@ -2,4 +2,4 @@ python-dateutil>=2.6.0
 pytz
 requests>=2.17.0
 six>=1.10.0
-msgpack==0.6.1
+msgpack
