chore(deps): update rollup to v2.10.2

[thi-bot]

This PR contains the following updates:

Package	Update	Type	Change
rollup (source)	minor	devDependencies	2.9.1 -> 2.10.2

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Release Notes

rollup/rollup

### [`v2.10.2`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2102) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.10.1...v2.10.2) _2020-05-15_ ##### Bug Fixes - Properly include calls to mutating array methods in certain scenarios ([#​3559](https://togithub.com/rollup/rollup/issues/3559)) ##### Pull Requests - [#​3559](https://togithub.com/rollup/rollup/pull/3559): Make sure UnknownFooExpressions are included when referenced as return values in a MultiExpression ([@​lukastaegert](https://togithub.com/lukastaegert)) ### [`v2.10.1`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2101) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.10.0...v2.10.1) _2020-05-15_ ##### Bug Fixes - Do not throw when "undefined" is used as a default export ([#​3558](https://togithub.com/rollup/rollup/issues/3558)) ##### Pull Requests - [#​3558](https://togithub.com/rollup/rollup/pull/3558): Properly handle default exporting undefined ([@​lukastaegert](https://togithub.com/lukastaegert)) ### [`v2.10.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2100) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.9.1...v2.10.0) _2020-05-13_ ##### Features - Avoid unnecessary empty imports from a facade chunk to the original chunk ([#​3552](https://togithub.com/rollup/rollup/issues/3552)) - Pin facade creation order so that if several user-defined chunks reference the same module, the first always becomes the "actual" chunk while the later ones become facades ([#​3552](https://togithub.com/rollup/rollup/issues/3552)) ##### Bug Fixes - Do not omit reexports from secondary chunks when creating facades for entry points without hoisting transitive dependencies ([#​3552](https://togithub.com/rollup/rollup/issues/3552)) ##### Pull Requests - [#​3552](https://togithub.com/rollup/rollup/pull/3552): Avoid unnecessary facade dependency inlining ([@​guybedford](https://togithub.com/guybedford))

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