Ensure the version number is correct

hynek · hynek · commit 92aeb9c08cf8 · 2017-11-08T19:46:22.000+01:00
diff --git a/src/attr/__init__.py b/src/attr/__init__.py
@@ -29,7 +29,7 @@
 from . import validators
 
 
-__version__ = "17.4.0.dev0"
+__version__ = "17.3.0"
 
 __title__ = "attrs"
 __description__ = "Classes Without Boilerplate"
