[feature request] typescript types definition support

[trylovetom]

Hello! There will be great to support the typescript types definition. Add the index.d.ts to notation the module type.

[lucagez]

Good Idea, just opened a PR for that if you want to have a look.
Not sure how to go about defining the type for the sjs schema. Any input would be much appreciated

[lucagez]

Typings are added in version 2.0.1