Update rollup to version 0.37.1 🚀

[greenkeeperio-bot]

Hello lovely humans,

rollup just published its new version 0.37.1.

State	Update 🚀
Dependency	rollup
New version	0.37.1
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 rollup.
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 52 commits .

• b3b1098 -> v0.37.1
• a804033 Merge pull request #450 from rollup/gh-447
• 490d428 skip symlink test on windows
• 70261d0 linting
• 2d7f8a7 merge master -> gh-447
• 3f39de8 Merge pull request #1143 from danez/recursive-functions
• 583b13d Improves tree-shaking by only considering program-level
• b04e790 Merge pull request #1152 from kzc/1146
• dfb8a3f Merge pull request #1144 from christopherthielen/master
• b1e4384 Update comments describing property string generation
• 2521f2e be more leniant in processing ExportDefaultDeclaration (#1146)
• bb546d3 Add test for bizzare moduleName
• f43fd99 Access global.* using array notation
• 98abe24 Merge pull request #1151 from rollup/gh-957
• 2d32cdd implement gatherPossibleValues on ExternalDeclaration - fixes #957

There are 52 commits in total. See the full diff.

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This pull request was created by greenkeeper.io.

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[coveralls]

Coverage remained the same at 100.0% when pulling 6f60676 on greenkeeper-rollup-0.37.1 into 0038b35 on master.