message: resolve typing issue on screenshoter.ts
diff: @@ -114,7 +114,7 @@ export class Screenshoter {
  throw new Error(errors.join('\n'));
  }
  - const pageScreenshotPNG = PNG.sync.read(await page.screenshot({ encoding: 'binary' }) as Buffer);
  + const pageScreenshotPNG = PNG.sync.read(await page.screenshot({ encoding: 'binary' }));
  const additionalScreenshotDataURL = await page.evaluate(() => {
  const testCaseWindow = window as unknown as TestCaseWindow;
  if (!testCaseWindow.checkChartScreenshot) {
  