Update remark-usage to version 3.0.0 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

remark-usage just published its new version 3.0.0, 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 remark-usage – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 6 commits .

• 3b87a26 3.0.0
• 940188a Refactorreadme.md``
• fe6b2d1 Add npm deployment to Travis
• c700ba9 Update metadata inpackage.json``
• 233726f Update dev-dependencies
• f5eb765 Update for changes inremark@4.0.0``

See the full diff.

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