refactor: cleanup Security

[paulbalandan]

Description

• Removes deprecated properties and methods
• Reorder methods (for visual clarity)
• Add static to verify() method (potentially breaking)
• Refactor Security
  • Faster and safer derandomize()
  • Early returns to reduce nested ifs
  • No unneeded persisting cookie instance (as used only once)
  • No unneeded persisting request instance (as used only once)

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value (without duplication)
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide