Include declarations in npm package

[preventdefault]

Currently every (parent)module has it's own type definition file (typings.d.ts). These files should be merged (during the build/publish process) into one declaration file that is included in the npm package.

Existing definition files should not be deleted

https://www.typescriptlang.org/docs/handbook/declaration-files/publishing.html#including-declarations-in-your-npm-package