setup: bump ipaddr minium version to 2.2.0 to get py3 support

2.2.0 is also the latest version, but released in 2017.

Previous versions failed installation on py3 with:

      File "/tmp/pip-install-o31ka351/ipaddr/ipaddr.py", line 1450
        ip_int = 0L
                  ^
    SyntaxError: invalid syntax
    ----------------------------------------

setup.py

@@ -67,7 +67,7 b' requirements = ['
     "Paste >= 2.0.3, < 3.1",
     "bleach >= 3.0, < 3.2",
     "Click >= 7.0, < 8",
-    "ipaddr >= 2.1.10, < 2.3",
+    "ipaddr >= 2.2.0, < 2.3",
     "paginate >= 0.5, < 0.6",
     "paginate_sqlalchemy >= 0.3.0, < 0.4",
 ]