on appveyor, run codecov only on success similar to our travis runs [ci skip]
on appveyor, run codecov only on success
similar to our travis runs
[ci skip]

original-commit-id: 600d4dacd6c110d1f4aa0e0dbf6590b40c91f4c8
original-commit-url: https://github.com/ipython-contrib/IPython-notebook-extensions/commit/600d4dacd6c110d1f4aa0e0dbf6590b40c91f4c8

jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator