Make obj/arr encoding more restrictive

[pnwpedro]

Description

• Make QueryObj only accept Map<String,E extends QueryFragment>
• Make QueryArr only accept List<E extends QueryFragment>

Motivation and context

QueryObj and QueryArr handle special cases where a user wants Fauna to evaluate sub queries at runtime as either values or elements respectively. This requires special encoding, and so all values/elements must be QueryFragments.

How was the change tested?

Tests updated

Screenshots (if appropriate):

Change types

• • Bug fix (non-breaking change that fixes an issue)
• • New feature (non-breaking change that adds functionality)
• • Breaking change (backwards-incompatible fix or feature)

Checklist:

• • My code follows the code style of this project.
• • My change requires a change to Fauna documentation.
• • My change requires a change to the README, and I have updated it accordingly.

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