Add/modify funds contract attributes

[EmmanuelAR]

Pull Request

• [x] Closes #182
• [x] Added tests (if necessary)
• [x] Run tests
• [x] Run formatting
• [x] Commented the code

Changes description

Changes: Fix type for name value and fix test Add new attribute evidence_link and contact_handle with get and set methods. Add test.

Current output

[EmmanuelAR]

@adrianvrj ready, please review it again plese Sr