Update js-yaml to version 3.5.1 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

js-yaml just published its new version 3.5.1, 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 js-yaml – 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 38 commits .

• 8f787fa 3.5.1 released
• 7522a0b Browser files rebuild
• e8cadbd Makefile cleanup
• 05799a3 Merge pull request #240 from gyandeeps/master
• df57eb5 Demo rewrite
• 6bf7c65 Fix: Removeinheritand use Object.create for inheritance (fixes #239)
• 6bdb5e7 Another workaround for esprima
• 4ad1e77 3.5.0 released
• bb68f88 Browser files rebuild
• 52eec6b Bower: ignore not needed files
• 6ba9171 Travis: node versions update
• b5a7580 Make sure to use local browserify/uglify-js/eslint
• 50a8456 Update README.md
• 32d1cca Add test case for issue #221
• 39deeac Merge pull request #236 from shaunc/flow-noblock

There are 38 commits in total. See the full diff.

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