Update dependency rollup to v2.47.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.45.2 -> 2.47.0

---

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)) ### [`v2.46.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2460) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.45.2...v2.46.0) _2021-04-29_ ##### Features - Add option to disable file name sanitation ([#​4058](https://togithub.com/rollup/rollup/issues/4058)) - Add information about importers to unused external import warning ([#​4054](https://togithub.com/rollup/rollup/issues/4054)) ##### Pull Requests - [#​4042](https://togithub.com/rollup/rollup/pull/4042): Use Github actions only ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​4045](https://togithub.com/rollup/rollup/pull/4045): Fix REPL artefact branch reference ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​4046](https://togithub.com/rollup/rollup/pull/4046): Use codecov action for coverage ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​4054](https://togithub.com/rollup/rollup/pull/4054): Add to `UNUSED_EXTERNAL_IMPORT` warning information about the origin of the problem ([@​cawa-93](https://togithub.com/cawa-93)) - [#​4058](https://togithub.com/rollup/rollup/pull/4058): Add sanitizeFileName option ([@​guybedford](https://togithub.com/guybedford))

---

Configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Disabled by config. Please merge this manually once you are satisfied.

:recycle: Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.