Allow custom line separator in `CSVArray::toCSV()` #53

Job	Run time
Validate composer dependencies	7s
Mutation Tests	25s
Code Coverage	17s
Normalize composer.json	11s
Fix PHP codestyle with php-cs-fixer	11s
Static Code Analysis	18s
Tests - PHP 7.4, Illuminate ^8.73, lowest	13s
Tests - PHP 7.4, Illuminate ^8.73, highest	12s
Tests - PHP 8.0, Illuminate ^8.73, lowest	11s
Tests - PHP 8.0, Illuminate ^9, lowest	19s
Tests - PHP 8.0, Illuminate ^8.73, highest	17s
Tests - PHP 8.0, Illuminate ^9, highest	18s
Tests - PHP 8.1, Illuminate ^8.73, lowest	11s
Tests - PHP 8.1, Illuminate ^9, lowest	13s
Tests - PHP 8.1, Illuminate ^10, lowest	12s
Tests - PHP 8.1, Illuminate ^8.73, highest	17s
Tests - PHP 8.1, Illuminate ^9, highest	17s
Tests - PHP 8.1, Illuminate ^10, highest	10s
Tests - PHP 8.2, Illuminate ^8.73, lowest	12s
Tests - PHP 8.2, Illuminate ^9, lowest	17s
Tests - PHP 8.2, Illuminate ^10, lowest	18s
Tests - PHP 8.2, Illuminate ^8.73, highest	13s
Tests - PHP 8.2, Illuminate ^9, highest	11s
Tests - PHP 8.2, Illuminate ^10, highest	11s
	5m 41s

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