fix(types): make typings for meta in responses v4 more specific

[SvenWesterlaken]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Whenever I want to use the pagination of a find() request in combination with typescript: it gives me an typescript error as the typing of the meta key is Record<string, unknown> and will result in the pagination being of type unknown.

Added the two different ways pagination is returned as types and used them in conjunction with expendable list of [key: string]: unknown to adhere to the original typing and leave room for flexibility.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes (if not applicable, please state why)