chore(requirements): update codecov to 2.0.5

https://github.com/codecov/codecov-python/blob/master/CHANGELOG.md

Author: helgi

rootfs/dev_requirements.txt

@@ -5,7 +5,7 @@ coverage==4.1.0
 flake8==2.5.4
 
 # code coverage report at https://codecov.io/github/deis/workflow
-codecov==2.0.3
+codecov==2.0.5
 
 # mock out python-requests, mostly k8s
 # requests-mock==1.0.0