fix version number

* tag '1.3.1':

Author: saxix

src/concurrency/__init__.py

@@ -5,7 +5,7 @@
 __author__ = 'sax'
 default_app_config = 'concurrency.apps.ConcurrencyConfig'
 
-VERSION = __version__ = (1, 3, 1, 'final§', 0)
+VERSION = __version__ = (1, 3, 1, 'final', 0)
 NAME = 'django-concurrency'