fix: add alias

Author: Kikobeats

packages/screenshot/src/index.js

@@ -183,7 +183,7 @@ module.exports = page => async (url, opts = {}) => {
   const screenshot = await page.screenshot({ type, ...args })
   if (!overlay) return screenshot
 
-  let { browserTheme, background = 'transparent' } = overlay
+  let { browser: browserTheme, background = 'transparent' } = overlay
 
   if (!background.includes('gradient')) {
     background = `linear-gradient(45deg, ${background} 0%, ${background} 100%)`