chore(deps): update dependency rollup to ^2.38.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rollup (source)	^2.36.2 -> ^2.38.0

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Release Notes

rollup/rollup

### [`v2.38.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2380) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.37.1...v2.38.0) _2021-01-22_ ##### Features - Entirely remove declared variables that only have an initializer side effect ([#​3933](https://togithub.com/rollup/rollup/issues/3933)) ##### Pull Requests - [#​3933](https://togithub.com/rollup/rollup/pull/3933): Tree-shake unused declarations while keeping initializer side-effects ([@​lukastaegert](https://togithub.com/lukastaegert)) ### [`v2.37.1`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2371) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.37.0...v2.37.1) _2021-01-20_ ##### Pull Requests - [#​3929](https://togithub.com/rollup/rollup/pull/3929): Deduplicate acorn import ([@​lukastaegert](https://togithub.com/lukastaegert)) ### [`v2.37.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2370) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.36.2...v2.37.0) _2021-01-19_ ##### Features - Always check modules for side effects that only indirectly reexport a used variable ([#​3840](https://togithub.com/rollup/rollup/issues/3840)) - Warn if a circular dependency would cause wrong execution order when preserving modules ([#​3840](https://togithub.com/rollup/rollup/issues/3840)) ##### Bug Fixes - Allow consuming synthetic exports via modules that reexport a namespace ([#​3894](https://togithub.com/rollup/rollup/issues/3894)) - Do not crash for circular default reexports ([#​3840](https://togithub.com/rollup/rollup/issues/3840)) - Do not crash for circular synthetic namespaces ([#​3840](https://togithub.com/rollup/rollup/issues/3840)) - Improve circular dependency execution order in certain scenarios ([#​3840](https://togithub.com/rollup/rollup/issues/3840)) ##### Pull Requests - [#​3840](https://togithub.com/rollup/rollup/pull/3840): Improve circular dependency execution order ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​3894](https://togithub.com/rollup/rollup/pull/3894): Always respect synthetic namespaces in namespace reexport ([@​lukastaegert](https://togithub.com/lukastaegert))

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