fix(useResponsive): use isBrowser instead of windowExists

[ihaichao]

[中文版模板 / Chinese template]

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Language	Changelog
🇺🇸 English	fix(useResponsive): use isBrowser instead of windowExists
🇨🇳 Chinese	useResponsive: 使用 isBrowser 替换 windowExists

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✅ ihaichao
❌ 名垂

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[brickspert]

这里有问题的。

以前在没有 window 的情况下，返回的是 info，现在返回的是 undefined，很不合理。

之前的更合理。

[ihaichao]

没有 window 的情况下， info 就是 undefined 啊