[Doppins] Upgrade dependency travis-deploy-once to ^5.0.11

[doppins-bot]

Hi!

A new version was just released of travis-deploy-once, so Doppins
has upgraded your project's dependency ranges.

Make sure that it doesn't break anything, and happy merging!

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Upgraded travis-deploy-once from ^4.3.4 to ^5.0.0

Changelog:

Version 5.0.0

5.0.0 (https://github.com/semantic-release/travis-deploy-once/compare/v4.4.1...v5.0.0) (2018-04-29)

Features

• require Node.js 6 (8f68fe1 (https://github.com/semantic-release/travis-deploy-once/commit/8f68fe1))

BREAKING CHANGES

• Node.js < 6 is not supported anymore

[coveralls]

Coverage remained the same at 100.0% when pulling e2c8cc7 on doppins/travis-deploy-once-from-5.0.0-below-6.0.0 into 9297bde on master.

[codecov-io]

Codecov Report

Merging #14 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #14   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          10     10           
  Lines          16     16           
=====================================
  Hits           16     16

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[doppins-bot]

An additional new version was just released of travis-deploy-once, so we've added an
extra commit upgrading your range to ^5.0.11.

Hope that's alright!
— Doppins