Add lastDayOfMonth support

[slimcandy]

Add trick to set last day of previous month with date.setDate(0).

[codecov]

Codecov Report

Merging #193 (aed8596) into production (0256fbb) will not change coverage.
The diff coverage is 100.00%.

❗ Current head aed8596 differs from pull request most recent head 60fe720. Consider uploading reports for the commit 60fe720 to get more accurate results

@@              Coverage Diff               @@
##           production      #193     +/-   ##
==============================================
  Coverage      100.00%   100.00%             
==============================================
  Files             490       530     +40     
  Lines            4426      1981   -2445     
  Branches          396        85    -311     
==============================================
- Hits             4426      1981   -2445     

Impacted Files	Coverage Δ
src/content/lodash/function/after/vanilla.js	100.00% <ø> (ø)
src/content/lodash/function/before/vanilla.js	100.00% <ø> (ø)
src/content/lodash/function/debounce/lodash.js	100.00% <ø> (ø)
src/content/lodash/function/delay/lodash.js	100.00% <ø> (ø)
src/content/lodash/function/once/lodash.js	100.00% <ø> (ø)
...ntent/date-fns/08-month/lastDayOfMonth/date-fns.js	100.00% <100.00%> (ø)
...ontent/date-fns/08-month/lastDayOfMonth/vanilla.js	100.00% <100.00%> (ø)
src/content/lodash/array/difference/vanilla.js	100.00% <100.00%> (ø)
src/content/lodash/array/differenceBy/vanilla.js	100.00% <100.00%> (ø)
src/content/lodash/array/flatMap/lodash.js	100.00% <100.00%> (ø)
... and 542 more

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[cedmax]

Thank you for your contribution 🙂