chore(travis): get npm dependencies from npm-bundle-deps

npm-bundle-deps has been rewritten to be more robust

scripts/travis/fetch_bundle.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+# normalize the working dir to the directory of the script
+cd $(dirname $0);
+
+cd ../..
+curl "http://23.251.148.50:8000/tar/$TRAVIS_REPO_SLUG/$TRAVIS_COMMIT" | tar xz