fix(handler-aws): check for canHandle existence

Author: brunozoric

packages/handler-aws/src/raw/index.ts

@@ -55,6 +55,13 @@ export const createHandler = <Payload = any, Response = APIGatewayProxyResult>(
         const plugins = app.webiny.plugins
             .byType<RawEventHandler<Payload, any, Response>>(RawEventHandler.type)
             .filter(plugin => {
+                /**
+                 * Just in case check that the plugin contains canHandle method.
+                 * If it does not, we assume it can handle any payload.
+                 */
+                if (typeof plugin.canHandle !== "function") {
+                    return true;
+                }
                 return plugin.canHandle(payload);
             })
             .reverse();