Update phpunit.xml to display more info.

Update tested up to PHP 8.5.

Update .gitignore file.

v2.1.2

Update README.md

v2.1.1

Add more tests.

Add `thaiIntlDate()` function.

Update more tests.

Add locale detection for testing.

Improve strftime to intlDate pattern replacement.

Update replace in `strftimeFormatToIntlDatePattern()`.

v2.1.0

Update HTTP tests.

Typo fix.