format dayjs utc object with current timezone

**Describe the bug**
I want to format UTC date (comes from backend) with current timezone. Can't find a way to do it. But `fromNow` formats a relative string, keeping in mind current timezone.

**Expected behavior**
It's a bit inconsistent that relative formatting of UTC date respects current timezone and absolute doesn't.

The only problem here is to format utc time with current timezone. I can't find any flag such as `respectTimezone`, so absolute date is formatted relative to current timezone.

**Information**
- Day.js Version 1.9.7
- OS: Xubuntu
- Browser Chromium Version 87.0.4280.88 (Official Build) snap (64-bit), Firefox 84.0
- Time zone: GMT+0300 (Moscow Standard Time)

code:
```js

dayjs.extend(dayjs_plugin_relativeTime)
dayjs.extend(dayjs_plugin_localizedFormat)
dayjs.extend(dayjs_plugin_utc)
dayjs.extend(dayjs_plugin_timezone)

console.log(String(new Date()))

const now = dayjs()
console.log('now:', now.format())

const date = dayjs.utc("2020-12-20T23:30:00.000")
console.log('UTC date:', date.format())
console.log('UTC date format LLL:', date.format('LLL'))
console.log('UTC date from now:', date.fromNow())
```

output:
```
"Mon Dec 21 2020 02:45:43 GMT+0300 (Moscow Standard Time)"
"now:" "2020-12-21T02:45:43+03:00"
"UTC date:" "2020-12-20T23:30:00Z"
"UTC date format LLL:" "December 20, 2020 11:30 PM"
"UTC date from now:" "16 minutes ago"
```

Pen:
https://codepen.io/mahenzon/pen/NWRvdYV?editors=0011

Screenshot:

Start by reproducing the issue with the provided dayjs.utc example and the relativeTime, localizedFormat, utc, and timezone plugins. Compare the absolute format output with fromNow in the reported GMT+0300 timezone; done means the intended current-timezone behavior is defined and covered for UTC input.

Written by the indexing model from the issue text.