chore(deps): update dependency rollup to v2.43.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.42.4 -> 2.43.0

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Release Notes

rollup/rollup

v2.43.0

Compare Source

2021-03-27

Features

• Track side effects of function properties in objects for better tree-shaking (#​4011)

Pull Requests

• #​4011: isable pessimistic object deoptimization for calls when the called function doesn't ref this (@​marijnh)
• #​4012: fix sourcemap reference in docs (@​tjenkinson)
• #​4015: Use SIGTERM instead of SIGINT to kill test child processes in tests (@​marijnh)

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