v2.4.0

Warning
This version contains a security vulnerability. You can read about it here. Please use it with caution or upgrade to v2.4.1.

• Add Element.get_parent method
• Fix an error that sometimes appear when using Page.on_url_request
• Can get signed in user even when changing URL
• Add Element.get_unique_selector method
• Check if SECRET_KEY environment variable is already assigned before assigning random key

Full Changelog: v2.3.0...v2.4.0