codecov needs argparse on 2.6

Author: davidism

tox.ini

@@ -34,6 +34,8 @@ passenv = CI TRAVIS TRAVIS_*
 deps = codecov
 skip_install = true
 commands =
+    # install argparse for 2.6
+    python -c 'import sys, pip; sys.version_info < (2, 7) and pip.main(["install", "argparse", "-q"])'
     coverage combine
     coverage report
     codecov