test: add widget config tests (batch 5)

src/widgets/nextdns/widget.test.js

@@ -0,0 +1,11 @@
+import { describe, it } from "vitest";
+
+import { expectWidgetConfigShape } from "test-utils/widget-config";
+
+import widget from "./widget";
+
+describe("nextdns widget config", () => {
+  it("exports a valid widget config", () => {
+    expectWidgetConfigShape(widget);
+  });
+});