On registry https://registry.npmjs.org/, the "latest" version (v5.0.11) of dependency travis-deploy-once has the following deprecation notice:

We recommend to use Travis Build Stages instead

Marking the latest version of an npm package as deprecated results in the entire package being considered deprecated, so contact the package author you think this is a mistake.

Affected package file(s): package.json

If you don't care about this, you can close this issue and not be warned about travis-deploy-once's deprecation again. If you would like to completely disable all future deprecation warnings then add the following to your config:

"suppressNotifications": ["deprecationWarningIssues"]