Update eslint to version 3.9.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

eslint just published its new version 3.9.0.

State	Update :rocket:
Dependency	eslint
New version	3.9.0
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 eslint. 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 :sparkles:

You rock!

:palm_tree:

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The new version differs by 1637 commits .

• 261d728 3.9.0
• c2e4f6d Build: package.json and changelog update for 3.9.0
• d933516 New: no-useless-return rule (fixes #7309) (#7441)
• 5e7af30 Update: Add CallExpression option for indent (fixes #5946) (#7189)
• b200086 Fix: Support type annotations in array-bracket-spacing (#7445)
• 5ed8b9b Update: Deprecate prefer-reflect (fixes #7226) (#7464)
• 92ad43b Chore: Update deprecated rules in conf/eslint.json (#7467)
• e46666b New: Codeframe formatter (fixes #5860) (#7437)
• fe0d903 Upgrade: Shelljs to ^0.7.5 (fixes #7316) (#7465)
• 1d5146f Update: fix wrong indentation about catch,finally (#7371)
• 77e3a34 Chore: Pin mock-fs dev dependency (#7466)
• c675d7d Update: Fix no-useless-escape false negative in regexes (fixes #7424) (#7425)
• ee3bcea Update: add fixer for newline-after-var (fixes #5959) (#7375)
• 6e9ff08 Fix: indent.js to support multiline array statements. (#7237)
• f8153ad Build: Ensure absolute links in docs retain .md extensions (fixes #7419) (#7438)

There are 250 commits in total. See the full diff.