chore(package): Disable node_modules caching on Travis CI (#1561)
chore(package): Disable node_modules caching on Travis CI (#1561)

This disabled caching of the `node_modules` directory again,
as this is causing failures on Travis CI while building the installers.

Change-Type: patch
resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/herostratus,resin-io/resin-etcher,resin-io/etcher,resin-io/etcher,resin-io/resin-etcher