chore(deps): update dependency rollup to v2.61.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.60.2 -> 2.61.0

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Release Notes

rollup/rollup

### [`v2.61.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2610) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.60.2...v2.61.0) *2021-12-09* ##### Features - Support ergonomic brand checks for private fields ([#​4293](https://togithub.com/rollup/rollup/issues/4293)) ##### Bug Fixes - Improve handling of directory creation on systems with restrictive open files limit ([#​4288](https://togithub.com/rollup/rollup/issues/4288)) ##### Pull Requests - [#​4288](https://togithub.com/rollup/rollup/pull/4288): modifymkdirpath ([@​mgrabowski84](https://togithub.com/mgrabowski84)) - [#​4293](https://togithub.com/rollup/rollup/pull/4293): bump deps ([@​dnalborczyk](https://togithub.com/dnalborczyk))

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