Update superagent to version 1.7.1 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

superagent just published its new version 1.7.1, 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 superagent – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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GitHub Release

• Fixed a conflict with express when using npm 3.x (Glenn)
• Fixed redirects after a multipart/form-data POST request (cyclist2)

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The new version differs by 152 commits .

• 2a3cc1d v1.7.1
• 324c97a Merge pull request #865 from mrsharpoblunto/master
• 8f5abf1 Fixed conflict with express (and possibly other libraries) when using npm 3.x caused by superagent modifying the list of http methods coming from the 'methods' package
• 5b903fa Merge pull request #848 from heategn/fix/multipart/form-data-redirect
• 2a84525 v1.7.0
• f42e0d3 Merge pull request #855 from pra85/patch-1
• 96dbd01 Update license year to 2016
• 5155e8b Merge pull request #761 from sprightco/master
• 8b10519 Merge pull request #844 from jisaacks/master
• c1d0edf Merge pull request #847 from visionmedia/testlts
• 7c7f194 Fixed a bug that would occur on a multipart/form-data POST request, followed by redirect response from the server. A callback within the .end function would not execute causing a server timeout.
• 67e4c9b Update node versions used in test
• bc8b45e Ignore test if File constructor not supported
• 095f2dc Add client test for 46b8dfec3970ebe130de00a9d1bdcf5c80474034
• 46b8dfe Default filename to files name

There are 152 commits in total. See the full diff.

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