Full Changelog: v1.5.9.6...v1.5.9.9

Full Changelog: v1.5.9.6...v1.5.9.8

• New Feature: Added support for operating_system and software fields in the Rule Builder. Users can now create rules based on the operating system and browser software detected by WhatIsMyBrowser API.
• Enhancement: Introduced flexible string matching operators (equals, not_equals, contains, not_contains) for operating_system and software fields to allow for more granular rule configurations.
• UI Update: Updated the Rule Builder UI to display new dropdown menus and input fields for operating_system and software criteria.
• Improvement: Ensured that unknown or unexpected values from the WhatIsMyBrowser API can still be handled using string-based matching.
• Maintenance: Minor code refactoring and improved sanitization for input fields in the settings and rule builder sections.
• Compatibility: Confirmed compatibility with the latest WordPress and tested against various common browser user agents.