Updated specific result/response interface fields from null to current appropriate type

[newmoneybigbucks]

A number of the response/result interfaces had fields that contained a "null" for their data types, so I went through and changed them to the appropriate type as indicated by the api website and the api data that gets returned. I almost all of them became "null | string" instead of just "null"

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 52d310e983b7c6c70af3e2d2d6b35cd098f18437

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------ | ----- | | tmdb-js-core | Patch |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[newmoneybigbucks]

Got that final formatted ci check sorted out.

[JorrinKievit]

Thanks!