added CircularRevealTransition

@@ -184,3 +184,26 @@ class SizeTransitions {
     );
   }
 }
+
+
+class CircularRevealTransition {
+  Widget buildTransitions(
+      BuildContext context,
+      Curve? curve,
+      Alignment? alignment,
+      Animation<double> animation,
+      Animation<double> secondaryAnimation,
+      Widget child) {
+    return ClipPath(
+      clipper: CircularRevealClipper(
+        fraction: animation.value,
+        centerAlignment:  Alignment.center,
+        centerOffset: Offset.zero,
+        minRadius: 0,
+        maxRadius: 800,
+      ),
+      child: child,
+    );
+  }
+}
+