Actually, we can work around needing dateutil.

If dateutil is present, we'll use that. If not, we'll use
some regexes from the fixed_datetime module.

sleekxmpp/plugins/xep_0202/stanza.py

@@ -11,12 +11,7 @@ import datetime as dt
 
 from sleekxmpp.xmlstream import ElementBase
 from sleekxmpp.plugins import xep_0082
-
-try:
-    from dateutil.tz import tzutc
-except:
-    log = logging.getLogger(__name__)
-    log.warning("XEP-0202 plugin requies dateutil package")
+from sleekxmpp.thirdparty import tzutc, tzoffset
 
 
 class EntityTime(ElementBase):