Update express to version 4.15.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

express just published its new version 4.15.0.

State	Update 🚀
Dependency	express
New version	4.15.0
Type	devDependency

This version is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of express.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

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The new version differs by 66 commits .

• 504a51c 4.15.0
• 7f96896 deps: update example dependencies
• f59de6a build: Node.js@7.7
• 7247554 build: Node.js@6.10
• 146a13e build: Node.js@4.8
• 9722202 Add next("router") to exit from router
• 51f5290 Fix case where router.use skipped requests routes did not
• 8b6dc6c Use "%o" in path debug to tell types apart
• 081b811 perf: add fast match path for "*" route
• 1f71fae tests: add lone "*" route tests
• acc4a61 deps: serve-static@1.12.0
• 1b43166 deps: send@0.15.0
• 6022567 Use setprototypeof module to replace proto setting
• 12ff56e Use Object.create to setup request & response prototypes
• 668f545 Skip routing when req.url is not set

There are 66 commits in total. See the full diff.

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