Update dependency rollup to v1.20.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
rollup	devDependencies	minor	1.19.4 -> 1.20.0

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Release Notes

rollup/rollup

v1.20.0

Compare Source

2019-08-21

Features

• Add augmentChunkHash plugin hook to be able to reflect changes in renderChunk in the chunk hash (#​2921)

Bug Fixes

• Do not mutate the acorn options object (#​3051)
• Make sure the order of emitted chunks always reflects the order in which they were emitted (#​3055)
• Do not hang when there are strings containing comment-like syntax in some scenarios (#​3069)

Pull Requests

• #​2921: Add augmentChunkHash plugin hook (@​isidrok)
• #​2995: Add info on installing locally to docs (@​mesqueeb)
• #​3037: Refresh pull request labels (@​shellscape)
• #​3048: Document ROLLUP_WATCH environment variable (@​shellscape)
• #​3051: Avoid changes to the original options (.acorn) object (@​LongTengDao)
• #​3052: Minor refactoring: Remove one try-catch (@​KSXGitHub)
• #​3053: Refactor to use async-await in more places (@​KSXGitHub)
• #​3055: Provide consistent chunking via a consistent order of entry modules when emitting chunks (@​lukastaegert)
• #​3058: Remove acorn-bigint and acorn-dynamic-import from bundle (@​LongTengDao)
• #​3061: Update to acorn@7 (@​lukastaegert)
• #​3063: Auto-generate license file (@​lukastaegert)
• #​3069: Prevent infinite loop when scanning for line-breaks and there are comment-like strings (@​lukastaegert)

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