Update node-circleci-autorelease to version 2.1.6 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

node-circleci-autorelease just published its new version 2.1.6, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of node-circleci-autorelease – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 170 commits (ahead by 170, behind by 2).

• 8ea135a v2.1.6
• bf0bbff release 2.1.6
• 1ac507b modify message after npm publish failure
• 5a4319c release 2.1.5
• b04d67e remove LF from npm publish result
• 1cf96d3 release 2.1.4
• 92c1294 show valid version when npm publish succeeded
• a1aef66 release 2.1.3
• c72db18 don't shrinkwrap
• 4bc8f2e change implementation of writing circle.yml for gh-pages
• 0459d3d show result of npm publish
• ed4dc9d release 2.1.2
• 1a6d371 add circle.yml to gh-pages
• e371015 release 2.1.1
• c8eb2c7 show information of re-installing node_modules

There are 170 commits in total. See the full diff.

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