Require PHP >= 7.3

Changed

• Require PHP >=7.3 or >=8.0
• Upgrade php-cs-fixer dependency and fix-cs
• Migrate code to PHP 7.3 adding scalar param type hints and return types
• Upgrade phpunit dependency and fix tests
• Migrate from travis-ci to github actions

Return value from fputcsv

Thanks to @kumamidori contribution, the fputcsv function mimic the return values from the native function.

Stream filter feature

The new stream filter feature allows to integrate this component with league/csv using the Stream Filter API.

Review the README for more info.

Initial release

Drop in replacement for native PHP CSV related functions to read and/or write RFC 4180 compliant CSV files.

Native	Alternative
fgetcsv	Ajgl\Csv\Rfc\fgetcsv
fputcsv	Ajgl\Csv\Rfc\fputcsv
str_getcsv	Ajgl\Csv\Rfc\str_getcsv
SplFileObject::fgetcsv	Ajgl\Csv\Rfc\Spl\SplFileObject::fgetcsv
SplFileObject::fputcsv	Ajgl\Csv\Rfc\Spl\SplFileObject::fputcsv
SplFileObject::setCsvControl	Ajgl\Csv\Rfc\Spl\SplFileObject::setCsvControl