Bump version to 2.2.0-rc.1

hardbyte · hardbyte · commit c61d5c7cbc3f · 2018-06-29T22:55:37.000+10:00
diff --git a/can/__init__.py b/can/__init__.py
@@ -9,7 +9,7 @@
 
 import logging
 
-__version__ = "2.2.0-dev"
+__version__ = "2.2.0-rc.1"
 
 log = logging.getLogger('can')
 
