don't cache node_modules on travis https://github.com/travis-ci/travis-ci/issues/3758
don't cache node_modules on travis https://github.com/travis-ci/travis-ci/issues/3758
codeforscience/sciencefair,greggraf/sciencefair,codeforscience/sciencefair,greggraf/sciencefair,greggraf/sciencefair,codeforscience/sciencefair