CI: Use bash not sh for .travis/deploy.sh (#198)
CI: Use bash not sh for .travis/deploy.sh (#198)

We use bashisms in the `deploy.sh` script and need to invoke with with
`bash` not `sh`, despite the shebang at the top of the deploy script.
letsencrypt/pebble,letsencrypt/pebble,letsencrypt/pebble