scratch-storage not deploying to npm

[benjiwheeler]

since we moved from travis-ci.org to travis-ci.com, scratch-storage has not been deploying to npm. The problem is that the travis-after-all library assumes travis-ci.org.

We should stop using the deprecated travis-after-all library, and update our .travis.yml file to use a deploy section rather than an after_script section.

[rschamp]

🎉 This issue has been resolved in version 1.3.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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