Bump rollup from 1.13.1 to 1.15.6

[dependabot-preview[bot]]

Bumps rollup from 1.13.1 to 1.15.6.

Release notes

*Sourced from [rollup's releases](https://github.com/rollup/rollup/releases).* > ## v1.15.6 > *2019-06-16* > > ### Bug Fixes > * No longer use an alternate screen in watch mode to allow scrolling ([#2942](https://github-redirect.dependabot.com/rollup/rollup/issues/2942)) > * Prioritize non-external imports over external ones when resolving conflicting namespace re-exports ([#2893](https://github-redirect.dependabot.com/rollup/rollup/issues/2893)) > > ### Pull Requests > * [#2893](https://github-redirect.dependabot.com/rollup/rollup/pull/2893): Improve handling of conflicting namespace exports ([@​aleclarson](https://github.com/aleclarson)) > * [#2942](https://github-redirect.dependabot.com/rollup/rollup/pull/2942): Get rid of alternate screen and simplify screen clearing ([@​lukastaegert](https://github.com/lukastaegert)) > > ## v1.15.5 > *2019-06-14* > > ### Bug Fixes > * Do not include any comments for completely tree-shaken files so that `renderedLength === 0` is a reliable check ([#2940](https://github-redirect.dependabot.com/rollup/rollup/issues/2940)) > * Do not cause type errors when returning `null` from `resolveId` ([#2941](https://github-redirect.dependabot.com/rollup/rollup/issues/2941)) > > ### Pull Requests > * [#2940](https://github-redirect.dependabot.com/rollup/rollup/pull/2940): Completely omit files that do not have any included statements ([@​lukastaegert](https://github.com/lukastaegert)) > * [#2941](https://github-redirect.dependabot.com/rollup/rollup/pull/2941): Explicitly allow null as return value for various hooks ([@​lukastaegert](https://github.com/lukastaegert)) > > ## v1.15.4 > *2019-06-14* > > ### Bug Fixes > * Improve how asset and chunk URLs are resolved for UMD, IIFE and CJS output ([#2937](https://github-redirect.dependabot.com/rollup/rollup/issues/2937)) > > ### Pull Requests > * [#2937](https://github-redirect.dependabot.com/rollup/rollup/pull/2937): Fix URL resolution to work when the current script contains query parameters ([@​lukastaegert](https://github.com/lukastaegert)) > > ## v1.15.3 > *2019-06-13* > > ### Bug Fixes > * Always reemit assets and chunks from cached transform hooks ([#2936](https://github-redirect.dependabot.com/rollup/rollup/issues/2936)) > > ### Pull Requests > * [#2936](https://github-redirect.dependabot.com/rollup/rollup/pull/2936): Fix repeated re-emission of files emitted from a transform hook ([@​lukastaegert](https://github.com/lukastaegert)) > > ## v1.15.2 > *2019-06-13* > > ### Bug Fixes > * Make sure chunks emitted from transform hooks are also emitted for incremental builds in watch mode ([#2933](https://github-redirect.dependabot.com/rollup/rollup/issues/2933)) > > ### Pull Requests > * [#2933](https://github-redirect.dependabot.com/rollup/rollup/pull/2933): Reemit chunks emitted from transform hooks ([@​lukastaegert](https://github.com/lukastaegert)) > > ## v1.15.1 > ... (truncated)

Changelog

*Sourced from [rollup's changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md).* > ## 1.15.6 > *2019-06-16* > > ### Bug Fixes > * No longer use an alternate screen in watch mode to allow scrolling ([#2942](https://github-redirect.dependabot.com/rollup/rollup/issues/2942)) > * Prioritize non-external imports over external ones when resolving conflicting namespace re-exports ([#2893](https://github-redirect.dependabot.com/rollup/rollup/issues/2893)) > > ### Pull Requests > * [#2893](https://github-redirect.dependabot.com/rollup/rollup/pull/2893): Improve handling of conflicting namespace exports ([@​aleclarson](https://github.com/aleclarson)) > * [#2942](https://github-redirect.dependabot.com/rollup/rollup/pull/2942): Get rid of alternate screen and simplify screen clearing ([@​lukastaegert](https://github.com/lukastaegert)) > > ## 1.15.5 > *2019-06-14* > > ### Bug Fixes > * Do not include any comments for completely tree-shaken files so that `renderedLength === 0` is a reliable check ([#2940](https://github-redirect.dependabot.com/rollup/rollup/issues/2940)) > * Do not cause type errors when returning `null` from `resolveId` ([#2941](https://github-redirect.dependabot.com/rollup/rollup/issues/2941)) > > ### Pull Requests > * [#2940](https://github-redirect.dependabot.com/rollup/rollup/pull/2940): Completely omit files that do not have any included statements ([@​lukastaegert](https://github.com/lukastaegert)) > * [#2941](https://github-redirect.dependabot.com/rollup/rollup/pull/2941): Explicitly allow null as return value for various hooks ([@​lukastaegert](https://github.com/lukastaegert)) > > ## 1.15.4 > *2019-06-14* > > ### Bug Fixes > * Improve how asset and chunk URLs are resolved for UMD, IIFE and CJS output ([#2937](https://github-redirect.dependabot.com/rollup/rollup/issues/2937)) > > ### Pull Requests > * [#2937](https://github-redirect.dependabot.com/rollup/rollup/pull/2937): Fix URL resolution to work when the current script contains query parameters ([@​lukastaegert](https://github.com/lukastaegert)) > > ## 1.15.3 > *2019-06-13* > > ### Bug Fixes > * Always reemit assets and chunks from cached transform hooks ([#2936](https://github-redirect.dependabot.com/rollup/rollup/issues/2936)) > > ### Pull Requests > * [#2936](https://github-redirect.dependabot.com/rollup/rollup/pull/2936): Fix repeated re-emission of files emitted from a transform hook ([@​lukastaegert](https://github.com/lukastaegert)) > > ## 1.15.2 > *2019-06-13* > > ### Bug Fixes > * Make sure chunks emitted from transform hooks are also emitted for incremental builds in watch mode ([#2933](https://github-redirect.dependabot.com/rollup/rollup/issues/2933)) > > ### Pull Requests > * [#2933](https://github-redirect.dependabot.com/rollup/rollup/pull/2933): Reemit chunks emitted from transform hooks ([@​lukastaegert](https://github.com/lukastaegert)) > > ## 1.15.1 > ... (truncated)

Commits

- [`1347489`](https://github.com/rollup/rollup/commit/1347489e051316ada85074d534ff6267630cfa2e) 1.15.6 - [`9624952`](https://github.com/rollup/rollup/commit/9624952036e4e5c4ca9beb4d1d5c844ff3dc2606) Update changelog - [`f4b19ab`](https://github.com/rollup/rollup/commit/f4b19ab5c90c98af1108fc1aee27ebbeb432cf63) Improve handling of conflicting namespace exports ([#2893](https://github-redirect.dependabot.com/rollup/rollup/issues/2893)) - [`7d1bd82`](https://github.com/rollup/rollup/commit/7d1bd824d80b08a9e0cd23311cae3004bbfa170b) Get rid of alternate screen and simplify screen clearing ([#2942](https://github-redirect.dependabot.com/rollup/rollup/issues/2942)) - [`3a5c17a`](https://github.com/rollup/rollup/commit/3a5c17ab3dfc45971bed30697e0e58036b5dd55d) 1.15.5 - [`c1ba368`](https://github.com/rollup/rollup/commit/c1ba3684558275390837bf8198b71264180108e0) Update changelog - [`b216023`](https://github.com/rollup/rollup/commit/b2160230822aa5afa947d4b37381bf677ab81554) Completely omit files that do not have any included statements ([#2940](https://github-redirect.dependabot.com/rollup/rollup/issues/2940)) - [`dd00ff5`](https://github.com/rollup/rollup/commit/dd00ff5e480cacc368cc34dff7c2f1a3936d8d0f) Explicitly allow null as return value for various hooks ([#2941](https://github-redirect.dependabot.com/rollup/rollup/issues/2941)) - [`74a3be1`](https://github.com/rollup/rollup/commit/74a3be18fc780271e19fc9fe4209c97f1f18fd09) 1.15.4 - [`fb497a5`](https://github.com/rollup/rollup/commit/fb497a57c1da555652c8fd9225164a228026eac4) Update changelog - Additional commits viewable in [compare view](https://github.com/rollup/rollup/compare/v1.13.1...v1.15.6)

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Superseded by #79.