chore(deps): update dependency rollup to ^2.29.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	minor	^2.28.1 -> ^2.29.0

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Release Notes

rollup/rollup

### [`v2.29.0`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2290) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.28.2...v2.29.0) _2020-10-08_ ##### Features - Allow passing custom options to other plugins via `this.resolve` ([#​3807](https://togithub.com/rollup/rollup/issues/3807)) - Allow attaching custom meta information to modules when resolving, loading or transforming ([#​3807](https://togithub.com/rollup/rollup/issues/3807)) - Do not throw but return `null` when using `this.getModuleInfo` for an unknown id ([#​3807](https://togithub.com/rollup/rollup/issues/3807)) ##### Bug Fixes - Trigger build in watch mode when files are added to a watched directory ([#​3812](https://togithub.com/rollup/rollup/issues/3812)) - Make `code` optional when transforming modules ([#​3807](https://togithub.com/rollup/rollup/issues/3807)) ##### Pull Requests - [#​3807](https://togithub.com/rollup/rollup/pull/3807): Implement new APIs for inter-plugin communication ([@​lukastaegert](https://togithub.com/lukastaegert)) - [#​3808](https://togithub.com/rollup/rollup/pull/3808): Document that the default value of --format is 'es' ([@​jameshfisher](https://togithub.com/jameshfisher)) - [#​3812](https://togithub.com/rollup/rollup/pull/3812): Watch: listen for new files added to a directory ([@​dmitrage](https://togithub.com/dmitrage)) ### [`v2.28.2`](https://togithub.com/rollup/rollup/blob/master/CHANGELOG.md#​2282) [Compare Source](https://togithub.com/rollup/rollup/compare/v2.28.1...v2.28.2) _2020-09-24_ ##### Bug Fixes - Fix a source of possible variable name conflicts when using preserveModules with SystemJS ([#​3796](https://togithub.com/rollup/rollup/issues/3796)) ##### Pull Requests - [#​3792](https://togithub.com/rollup/rollup/pull/3792): add documentation for output.PreserveModulesRoot ([@​davidroeca](https://togithub.com/davidroeca)) - [#​3796](https://togithub.com/rollup/rollup/pull/3796): Fix SystemJS default variable conflict ([@​lukastaegert](https://togithub.com/lukastaegert))

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