chore(deps): update dependency rollup to v2.26.3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	patch	2.26.2 -> 2.26.3

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Release Notes

rollup/rollup

### [`v2.26.3`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2263) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.26.2...v2.26.3) _2020-08-16_ ##### Bug Fixes - Fix a situation where line-breaks in a nested simplified conditional expression could result in broken code ([#​3734](https://togithub.com/rollup/rollup/issues/3734)) ##### Pull Requests - [#​3734](https://togithub.com/rollup/rollup/pull/3734): Prevent ASI when simplifying a nested logical expression ([@​lukastaegert](https://togithub.com/lukastaegert))

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:tada: This PR is included in version 3.3.2 :tada:

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