fixing lint

Author: weaverryan

src/Chartjs/Resources/assets/test/controller.test.ts

@@ -64,7 +64,7 @@ describe('ChartjsController', () => {
         });
 
         const chart = getByTestId(container, 'canvas').chart;
-        expect(chart.options.showLines).toBeUndefined;
+        expect(chart.options.showLines).toBeUndefined();
     });
 
     it('connect with options', async () => {