a plugin of RelativeTimeFormat
npm install lzb-relative-time-format
new RelativeTIime({lang: 'en', date:'2019-7-17 17:00:00'}).output // "1 hour ago"
new RelativeTIime({lang: 'zh', date:'2019-7-16 17:00:00'}).output // "昨天"
new RelativeTIime({lang: 'zh', date:'2019-7-15 17:00:00'}).output // "前天"
`
$3
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default is 'en'
* only for en & zh
$3
support Date object, milliseconds (Number), time in 2019-10-1 10:00:00` format.