try anvil strategy to see if it fixes deploy
Revert "try anvil strategy to see if it fixes deploy"

This reverts commit d2fa6bbaa19456804f019892d3b50c3dee4ca59a.
add pre deploy git fetch shallow

from https://github.com/travis-ci/travis-ci/issues/2272
Merge branch 'fix/deploy-heroky'
Merge remote-tracking branch 'origin/master'