chore(deps): update dependency rollup to v2.49.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	2.48.0 -> 2.49.0

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Release Notes

rollup/rollup

### [`v2.49.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2490) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.48.0...v2.49.0) *2021-05-23* ##### Features - Detect side-effect-free static class methods and properties ([#​4018](https://togithub.com/rollup/rollup/issues/4018)) - Detect side-effect-free array elements ([#​4018](https://togithub.com/rollup/rollup/issues/4018)) - Do not apply deoptimizations from dead code ([#​4018](https://togithub.com/rollup/rollup/issues/4018)) ##### Bug Fixes - Handle side effect detection for getters and setters added in untracked code ([#​4018](https://togithub.com/rollup/rollup/issues/4018)) - Track "this" mutations for methods, getters and setters ([#​4018](https://togithub.com/rollup/rollup/issues/4018)) ##### Pull Requests - [#​4018](https://togithub.com/rollup/rollup/pull/4018): Class method effects ([@​lukastaegert](https://togithub.com/lukastaegert))

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