chore(deps): update dependency typescript to v3.4.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
typescript	devDependencies	patch	3.4.1 -> 3.4.2	homepage, source

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Release Notes

Microsoft/TypeScript

### [`v3.4.2`](https://togithub.com/Microsoft/TypeScript/releases/v3.4.2) [Compare Source](https://togithub.com/Microsoft/TypeScript/compare/v3.4.1...v3.4.2) This update solely changes TSServer to provide responses to `configurePlugin` requests, and allows global plugins to be loaded by external projects during project creation. This enables TSServer plugins (like IntelliCode) to be used in editors like Visual Studio. For the complete list of fixed issues, check out the - [fixed issues query for Typescript v3.4 RC](https://togithub.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=is%3Aissue+milestone%3A%22TypeScript+3.4.0%22+is%3Aclosed+). - [fixed issues query for Typescript v3.4.1](https://togithub.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=is%3Aissue+milestone%3A%22TypeScript+3.4.1%22+is%3Aclosed+). - [relevant change for 3.4.2](https://togithub.com/Microsoft/TypeScript/pull/30731) Downloads are available on: - [npm](https://www.npmjs.com/package/typescript) - [Visual Studio 2017](https://marketplace.visualstudio.com/items?itemName=TypeScriptTeam.typescript-342-vs2017) ([Select new version in project options](https://togithub.com/Microsoft/TypeScript/wiki/Updating-TypeScript-in-Visual-Studio-2017)) - [NuGet package](https://www.nuget.org/packages/Microsoft.TypeScript.MSBuild)

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