Update babel-eslint to version 4.1.5 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

babel-eslint just published its new version 4.1.5, 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 babel-eslint – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 8 commits .

• fba0a49 4.1.5
• 6a4a80e Merge pull request #206 from mysticatea/fix-for-eslint-1.9
• 8c45795 fix for npm@3 and eslint@1.9
• 9295bba 4.1.4
• a10f083 update eslint, acorn-to-esprima
• d2e3862 test with ecmaFeatures on by default, add test for #192
• 521039c update readme, add contributing
• 85512de update packages

See the full diff.

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