Update jsdom to version 9.6.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

jsdom just published its new version 9.6.0.

State	Update 🚀
Dependency	jsdom
New version	9.6.0
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 jsdom.
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!

🌴

---

The new version differs by 14 commits .

• 7b11f2b Version 9.6.0
• 9a98748 Remove test that depends on backbonejs.org
• 394b593 Fix copying of attribute namespace prefixes
• f41e7bf Update idl conversion script to new webidl2js
• c47eab8 Implement HTMLCollection @@iterator
• 13badf0 Fixe a spelling mistake
• a6acac4 Add "jsdom vs. PhantomJS" to the README
• b3e5970 Update web platform test expectations
• 6ddbe2e Unset stopPropagationFlags due to latest DOM spec changes
• 7088940 Update XHR content-type header determination
• dc478dd Send XHR upload loadstart events immediately
• 3590d78 Make File's lastModified return the current time as the default
• e4fea5c Roll web platform tests
• 41fa538 Fix spurious ESLint error

See the full diff.