fix: valueOf not correct when cross summertime

[huoyuxin]

eg:

• system timezone Europe/Warsaw

• system date 2022-03-01

dayjs.tz.setDefault('Europe/Warsaw')
dayjs.tz().endOf('month').valueOf() -> 1648760399999, it should be 1648763999999

[codecov]

Codecov Report

Merging #1819 (95dccac) into dev (dcbf170) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               dev     #1819   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          180       180           
  Lines         2034      2034           
  Branches       524       524           
=========================================
  Hits          2034      2034           

Impacted Files	Coverage Δ
src/plugin/utc/index.js	100.00% <100.00%> (ø)

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[xvaara]

this is same as #1448
but since it's a year old and not merged (even though it's a big problem), one has to wonder where to focus of this project is.

[huoyuxin]

this is same as #1448 but since it's a year old and not merged (even though it's a big problem), one has to wonder where to focus of this project is.

does it mean that mr will not be merged, and summertime users like me can only fixed it in project ..

[iamkun]

Thanks, fixed in #1448