message: Promise void fix
diff: @@ -46,7 +46,7 @@ describe("Prometheus /metrics endpoint", () => {
  });
  const testMetric = (url: string, expectedMetric: any) => {
  - return new Promise((resolve) => {
  + return new Promise<void>((resolve) => {
  (async () => {
  await generateMetric(url);
  const { text } = await getMetrics();
  