Rebuild with ICU 71.1

[Shivam Mathur]

Homebrew has updated the icu4c formula to 71.1 and subsequently, all PHP formulae in this tap have been rebuilt with it.

So, please upgrade the PHP formula for the version you use.

For example to upgrade PHP 8.0:

brew update
brew upgrade shivammathur/php/php@8.0

Restart your terminal and verify the PHP version and ICU version

php -v
php -i | grep "ICU version"

At last, restart your webserver.