build: update devdependency rollup to ~2.16.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	minor	~2.15.0 -> ~2.16.0

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Release Notes

rollup/rollup

v2.16.1

Compare Source

2020-06-13

Bug Fixes

• Do not produce invalid code when an external or chunk id contain quotes or line-breaks (#​3632)
• Do not fail but emit a warning when mutating a namespace object (#​3633)

Pull Requests

• #​3632: Handle single quote escaping in ids (@​guybedford)
• #​3633: Turn namespace assignment error into a warning (@​guybedford)

v2.16.0

Compare Source

2020-06-12

Features

• Add support for numeric separators (#​3626)
• Switch to finalized ESTree optional chaining AST (#​3628)

Pull Requests

• #​3626: Support numeric separator (@​TrySound)
• #​3628: Acorn 7.3.0 upgrade (@​guybedford)
• #​3631: Improve discoverability of manualChunks for code splitting (@​zlamma)

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[codeclimate]

Code Climate has analyzed commit 376edfd and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (95% is the threshold).

This pull request will bring the total coverage in the repository to 100.0% (0.0% change).

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