Can't input negative years about dayjs HOT 8 OPEN

Maybe it will be better to be implemented via a plugin.
IMHO, this might be a project logic, not a common one in dayjs?

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I know this is potentially not easy given the Julian/Gregorian change, but it would be very useful!

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HI @willismonroe ,
I went through your issue and here's what I've come up with so far

dayjs('-2006').toDate() ==> Wed Jan 01 -2600 00:00:00 GMT-0016 (Greenwich Mean Time).

Is this enough for you? Do you have any other use cases you'd like to test?

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I just tried this on a REPL and got the same result as earlier:

This is version 1.11.10 btw

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Sorry @klm-turing were you showing the output of a proposed fix? If so, that's great. No other issues I'd like to test at the moment, as I mentioned earlier there are quite a few edge cases extra that would be worth looking into, but even just having negative years is a huge improvement.

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@willismonroe I wanted to know if it was enough for you first.

I linked a PR 2640. Test it and let me know

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@iamkun nice touch, I will do that

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@iamkun The plugin is done, If you have time, Please have a look.

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