Solution for issue 27. Updated dependencies, fixed typescript error in index.d.ts file.

[JustFly1984]

I've fixed types declaration for #27

Please review and publish new version.

[fredericbarthelet]

Hi @JustFly1984 and thanks for your contribution :)

Please note that, as stated in the Contribution guildelines, any modification made to the index.d.ts definition file of this repository is useless - the purpose of this repository is to generate those definition automatically from JSON schema validation constraints within the Serverless Framework. Your modifications would be removed on the next version release.

In order to generate valid types with the additionalProperties key of JSON Schema, an improvement shall be made on json-schema-to-ts library. You can help by contributing on bcherny/json-schema-to-typescript#356 (comment)

Closing this in the meantime. Thanks :)