chore(deps): update dependency rollup to v2.47.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.46.0 -> 2.47.0

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Release Notes

rollup/rollup

### [`v2.47.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2470) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.46.0...v2.47.0) _2021-05-04_ ##### Features - Warn about ambiguous imports from combined external namespace reexports ([#​4064](https://togithub.com/rollup/rollup/issues/4064)) - In case of combined namespace reexports, always prefer local exports over external namespaces ([#​4064](https://togithub.com/rollup/rollup/issues/4064)) - Treat conflicting names in local namespace reexports as undefined ([#​4064](https://togithub.com/rollup/rollup/issues/4064)) ##### Pull Requests - [#​4064](https://togithub.com/rollup/rollup/pull/4064): Prefer locally defined exports and reexports over external namespaces ([@​lukastaegert](https://togithub.com/lukastaegert))

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