Specify ZonedDateTime.toPlain{YearMonth,MonthDay}()

[ptomato]

See: #569

[codecov]

Codecov Report

Merging #1157 (53d5446) into main (5930868) will decrease coverage by 3.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1157      +/-   ##
==========================================
- Coverage   93.55%   90.54%   -3.01%     
==========================================
  Files          19       17       -2     
  Lines        7961     8740     +779     
  Branches     1264     1231      -33     
==========================================
+ Hits         7448     7914     +466     
- Misses        506      815     +309     
- Partials        7       11       +4     

Flag	Coverage Δ
test262	?
tests	90.54% <ø> (+1.11%)	⬆️

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Impacted Files	Coverage Δ
polyfill/lib/shim.mjs
polyfill/lib/legacydate.mjs
polyfill/lib/slots.mjs
polyfill/lib/intrinsicclass.mjs
lib/calendar.mjs	77.59% <0.00%> (ø)
lib/regex.mjs	100.00% <0.00%> (ø)
lib/plainyearmonth.mjs	89.80% <0.00%> (ø)
lib/plainmonthday.mjs	83.79% <0.00%> (ø)
lib/zoneddatetime.mjs	89.72% <0.00%> (ø)
lib/timezone.mjs	89.91% <0.00%> (ø)
... and 11 more

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[ptomato]

Thanks. Made the same change to the polyfill as well.