v2.1.0 of anydrawer

A Flutter drawer that slides from any edge. No Scaffold needed — backdrop blur, drag, return values, swipe-from-edge, multiple drawers, and declarative API. Changelog excerpt: ### 🚀 New Features - Barrier gesture penetration— DrawerConfig.barrierPenetrablelets pointer events pass through the backdrop to widgets behind the drawer (#6). ### 🔧 Maintenance - Narrowed Dart SDK upper bound from <5.0.0to <4.0.0. - Updated very_good_analysisto 10.3.0 and refreshed lockfile dependencies.