Update dependency rollup to v2.10.9

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	patch	2.10.8 -> 2.10.9

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Release Notes

rollup/rollup

### [`v2.10.9`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2109) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.10.8...v2.10.9) _2020-05-24_ ##### Bug Fixes - Prevent invalid exports when facades are created ([#​3590](https://togithub.com/rollup/rollup/issues/3590)) ##### Pull Requests - [#​3590](https://togithub.com/rollup/rollup/pull/3590): Prevent unneeded exports when entry facades are created and ensure all exported variables in facades are imported ([@​lukastaegert](https://togithub.com/lukastaegert))

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[bahmutov]

:tada: This PR is included in version 3.3.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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