Bump version to 2.1. Support Apple Silicon.

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Multi sites auto download, import/export keywords

Split view divider border to 1px, use block based api, remove get sea…

…son keyword source code.

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Fix bugs

1.5 beta

添加季度关键字功能（搜索标题＋字幕组），手动检查新数据

Default fetch today, yesterday, day before yesterday's subscribe keyw…

…ords and always fetch other category's keywords.

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