Bump typescript from 2.8.3 to 2.9.1

[dependabot-preview[bot]]

Bumps typescript from 2.8.3 to 2.9.1.

Release notes

*Sourced from [typescript's releases](https://github.com/Microsoft/TypeScript/releases).* > ## TypeScript 2.9 > For release notes, check out the [release announcement](https://blogs.msdn.microsoft.com/typescript/2018/05/31/announcing-typescript-2-9/) > > For new features, check out the [What's new in TypeScript 2.9](https://github.com/Microsoft/TypeScript/wiki/What's-new-in-TypeScript#typescript-29). > > For breaking changes, check out the [Breaking changes in TypeScript 2.9](https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#typescript-29) page. > > For the complete list of fixed issues, check out the issues fixed in [TypeScript 2.9 RC](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues?q=is%3Aissue+milestone%3A%22TypeScript+2.9%22+label%3A%22fixed%22+) and [after TypeScript 2.9 RC](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues?q=is%3Aissue+milestone%3A%22TypeScript+2.9.1%22+label%3A%22fixed%22+). > > Download: > - [npm](https://www.npmjs.com/package/typescript) > - [Visual Studio 2015 plugin](https://www.microsoft.com/en-us/download/details.aspx?id=48593) > - [Visual Studio 2017](https://www.microsoft.com/en-us/download/details.aspx?id=55258) ([Select new version in project options](https://github.com/Microsoft/TypeScript/wiki/Updating-TypeScript-in-Visual-Studio-2017)) > - [NuGet package](https://www.nuget.org/packages/Microsoft.TypeScript.MSBuild/2.9.1) > > Special thanks to all contributors to this release: > > * Aditya Daflapurkar > * Adrien Gibrat > * Alan Agius > * Alex Khomchenko > * Alex Ryan > * Alexander Tarasyuk > * Anders Hejlsberg > * Andrew Casey > * Andrew Faulkner > * Andy Hanson > * Armando Aguirre > * Artem Tyurin > * Arthur Ozga > * Benjamin Lichtman > * [**bluelovers**](https://github.com/bluelovers) > * Bowden Kenny > * Brandon Slade > * Daniel Rosenwasser > * Derek P Sifford > * Dhruv Rajvanshi > * Ecole Keine > * [**falsandtru**](https://github.com/falsandtru) > * Holger Jeromin > * Jack Williams > * Jordi Oliveras Rovira > * Joscha Feth > * Josh Goldberg > * Kevin Donnelly > * Khải > * Klaus Meinhardt > * Maarten Sijm > * Matt Bierner > * Mine Starks > ... (truncated)

Commits

- [`4ce4f58`](https://github.com/Microsoft/TypeScript/commit/4ce4f58243fcb933f2845ccad7497bd0e92ced09) Update LKG - [`01fc3d5`](https://github.com/Microsoft/TypeScript/commit/01fc3d58eeafec99767786f2f1fd8a096d4f3d4d) Revert "Check detected npm path is existing" - [`4369d54`](https://github.com/Microsoft/TypeScript/commit/4369d54c6b44b310423e852900b114189edb155f) Use external aliases in quickinfo and signature help return types ([#24391](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24391)) (#... - [`30415cd`](https://github.com/Microsoft/TypeScript/commit/30415cd4f45f0fb035d9e0b25d1b5d9bf6047a02) Update LKG - [`a7b2983`](https://github.com/Microsoft/TypeScript/commit/a7b2983d129d419323a7d6d566869be710919bc3) Disallow nested object param syntax in callback tag ([#24392](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24392)) - [`b23671b`](https://github.com/Microsoft/TypeScript/commit/b23671b96b1da04491d04e474cef341ae31c03d6) Update LKG - [`9164261`](https://github.com/Microsoft/TypeScript/commit/9164261183357ac72bdc74259fa043260f842dd3) Merge pull request [#24387](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24387) from weswigham/port-prologue-fix - [`246465e`](https://github.com/Microsoft/TypeScript/commit/246465e251d39263cc21a88bddc36fef529ffc52) Hoisted declarations should occur after prologue directives ([#24386](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24386)) - [`a7b7b3c`](https://github.com/Microsoft/TypeScript/commit/a7b7b3c2adf9ea5cc769292f18154d1e6d9b8b92) moveToNewFile: Format the new file ([#24379](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24379)) ([#24382](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24382)) - [`68bc957`](https://github.com/Microsoft/TypeScript/commit/68bc957cf640294bcfd444721603c315833c2276) moveToNewFile: Respect UserPreferences#quote ([#24365](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24365)) ([#24378](https://github-redirect.dependabot.com/Microsoft/TypeScript/issues/24378)) - Additional commits viewable in [compare view](https://github.com/Microsoft/TypeScript/compare/v2.8.3...v2.9.1)

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[dependabot-preview[bot]]

Superseded by #40.