Update rollup to the latest version 🚀

[greenkeeper]

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Version 0.57.1 of rollup was just published.

Dependency	rollup
Current Version	0.57.0
Type	devDependency

The version 0.57.1 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of rollup.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Commits

The new version differs by 13 commits.

• 23256e4 0.57.1
• 8684aef Merge branch 'config-cli-options-namespace'
• e186781 Distinguish options and CLI flags in warnings
• d822ff1 Rework config handling
• f12c3d1 * Use separate warnings for unknown input, output and CLI options
• afeeaec Merge branch 'danez-class-function-expression'
• e59aa99 Merge branch 'class-function-expression' of https://github.com/danez/rollup into danez-class-function-expression
• a5469ea Merge branch 'analysis-perf'
• 2358ad5 Use for-loops instead of forEach in more places.
• 133a751 use for loops
• 2b41d69 Merge branch 'mourner-faster-sourcemap'
• 25ade76 Fix Class and FunctionExpressions in default exports
• 1aa8849 remove redundant sourcemap roundtrip

See the full diff

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