- Bump version number to 1.6.13
- Update dependencies
- Replace `swiftmailer/swiftmailer` with `symfony/mailer`
- Ensure full compatibility with PHP 8.5
- Resolve all phpstan level 0 errors
- Add Http\DateTime
- Add getDate and setDate methods to Http\HeaderTrait
- Add Http\Request::getPathWithQueryString
- Remove `@package` phpdoc
- Add `@param-closure-this` phpdoc
- Add Http\Router::middleware method to apply `@param-closure-this` phpdoc to any returned closures, for instance in a middleware class
- Add phpdoc to Tel::parse method, with recommended parameter use
- Add Querystring::BEGIN constant