Update js-yaml to version 3.5.5 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

js-yaml just published its new version 3.5.5, 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 5 commits .

• fdd205e 3.5.5 released
• 37acf06 Browser files rebuild
• a5981c0 Merge pull request #269 from dplepage/fix-date-parsing
• 71d43fd Don't parse date-like strings as dates.
• dde0181 Add test for single-digit dates.

See the full diff.

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