chore(deps): update rollup to v2.0.5

[thi-bot]

This PR contains the following updates:

Package	Update	Type	Change	Sourcegraph
rollup (source)	patch	devDependencies	2.0.3 -> 2.0.5

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Release Notes

rollup/rollup

### [`v2.0.5`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​205) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.0.4...v2.0.5) _2020-03-12_ ##### Bug Fixes - Fix an issue where conditional statements would assume they have the wrong test value ([#​3438](https://togithub.com/rollup/rollup/issues/3438)) ##### Pull Requests - [#​3438](https://togithub.com/rollup/rollup/pull/3438): Make sure logical expressions always check the left argument for side-effects ([@​lukastaegert](https://togithub.com/lukastaegert)) ### [`v2.0.4`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​204) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.0.3...v2.0.4) _2020-03-12_ ##### Bug Fixes - Avoid conflicts between namespace imports when preserving modules ([#​3435](https://togithub.com/rollup/rollup/issues/3435)) ##### Pull Requests - [#​3435](https://togithub.com/rollup/rollup/pull/3435): Deconflict multiple `index` imports for ES format using nested export star statements ([@​kamranayub](https://togithub.com/kamranayub))

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