Added

• feat(SDK-4734): Implement support for Back-Channel Logout #882 (evansims) ¹

Changed

• Bumped auth0-php dependency version range to ^8.10.
• Raised the minimum supported PHP version to 8.1.
• Confirmed support for WordPress 6.4. Updated metadata to reflect support.

[!NOTE] ¹ To use this feature, an Auth0 tenant must have support for it enabled.