bumping version 0.12.1 => 0.13.0

Author: Emanuele Palazzetti

ddtrace/__init__.py

@@ -5,7 +5,7 @@
 from .tracer import Tracer
 from .settings import Config
 
-__version__ = '0.12.1'
+__version__ = '0.13.0'
 
 # configure the root logger
 logging.basicConfig()