Bump version [ci skip].

rolftimmermans · rolftimmermans · commit b3f4d4e37881 · 2017-07-17T10:53:21.000+02:00
diff --git a/tinify/version.py b/tinify/version.py
@@ -1 +1 @@
-__version__ = '1.5.0'
+__version__ = '1.5.1'
