Update imgflo-url to version 0.9.1 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

imgflo-url just published its new version 0.9.1, 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 imgflo-url – 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 29 commits .

• c724f44 Bump 0.9.1
• 5b04918 NPM: Fix lib/*.js not included
• b988d87 Bump 0.9.0
• 5e12401 Remove checked in .js files
• d46744f CHANGES: Add initial log, for 0.8.0
• 8b6216a Bump 0.8.0
• 96a49dc Travis: Setup autodeploy to NPM
• 13373d4 Request TIFFs as PNGs since TIFF browser support is lacking
• 0b9dc7d Lowercase format
• 1739115 Merge pull request #12 from the-grid/greenkeeper-mocha-2.3.3
• a3449c1 Merge pull request #10 from the-grid/greenkeeper-chai-3.3.0
• 741d212 chore(package): update chai to version 3.3.0
• d3009c1 Tests: Don't override whole env, just add our keys
• a5ed840 Travis: Use new container-based infra
• 888328a Tests: Use 'node' as prog instead of imgflo-url

There are 29 commits in total. See the full diff.

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