Feature - DictComp support

[Lkruitwagen]

Description

What is this PR doing?

Adding support for DictComprehensions to EvalWithCompoundTypes. Addresses #57.

Pre-approval checklist (for submitter)

Please complete these steps

• [x] Passes tests
• [x] New tests for additional features or changed functionality
• [x] My name and contribution added to contributors list (or if I'd rather opt out, I've said so in the PR)