Exposing CanvasReference (#100)

for interop with style and attribute

Author: Thaina

src/Blazor.Extensions.Canvas/BECanvasComponent.cs

@@ -15,7 +15,7 @@ public class BECanvasComponent : ComponentBase
         protected readonly string Id = Guid.NewGuid().ToString();
         protected ElementReference _canvasRef;
 
-        internal ElementReference CanvasReference => this._canvasRef;
+        public ElementReference CanvasReference => this._canvasRef;
 
         [Inject]
         internal IJSRuntime JSRuntime { get; set; }