Use TypeScript type definitions from @jupiterone/data-model

[philidem]

To make it easier to catch schema validation errors during development, we should generate typescript type definitions from our JSON schema for the data model.

[ctdio]

We should probs create an issue over in https://github.com/jupiterone/data-model since that would probably be the place to do the type gen.

[aiwilliams]

I've created JupiterOne/data-model#12 and changed this issue to indicate that we should use the types from data-model.