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

[renovate[bot]]

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`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2430) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.42.4...v2.43.0) _2021-03-27_ ##### Features - Track side effects of function properties in objects for better tree-shaking ([#​4011](https://togithub.com/rollup/rollup/issues/4011)) ##### Pull Requests - [#​4011](https://togithub.com/rollup/rollup/pull/4011): isable pessimistic object deoptimization for calls when the called function doesn't ref this ([@​marijnh](https://togithub.com/marijnh)) - [#​4012](https://togithub.com/rollup/rollup/pull/4012): fix `sourcemap` reference in docs ([@​tjenkinson](https://togithub.com/tjenkinson)) - [#​4015](https://togithub.com/rollup/rollup/pull/4015): Use SIGTERM instead of SIGINT to kill test child processes in tests ([@​marijnh](https://togithub.com/marijnh))

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