You can install the package via composer:
composer require spatie/laravel-data
Optionally, You can publish the config file with:
php artisan vendor:publish --provider="Spatie\LaravelData\LaravelDataServiceProvider" --tag="data-config"
This is the contents of the published config file:
return [
    
    'date_format' => DATE_ATOM,
    
    'transformers' => [
        DateTimeInterface::class => \Spatie\LaravelData\Transformers\DateTimeInterfaceTransformer::class,
        \Illuminate\Contracts\Support\Arrayable::class => \Spatie\LaravelData\Transformers\ArrayableTransformer::class,
        BackedEnum::class => Spatie\LaravelData\Transformers\EnumTransformer::class,
    ],
    
    'casts' => [
        DateTimeInterface::class => Spatie\LaravelData\Casts\DateTimeInterfaceCast::class,
        BackedEnum::class => Spatie\LaravelData\Casts\EnumCast::class,
    ],
    
    'rule_inferrers' => [
        Spatie\LaravelData\RuleInferrers\SometimesRuleInferrer::class,
        Spatie\LaravelData\RuleInferrers\BuiltInTypesRuleInferrer::class,
        Spatie\LaravelData\RuleInferrers\AttributesRuleInferrer::class,
        Spatie\LaravelData\RuleInferrers\NullableRuleInferrer::class,
        Spatie\LaravelData\RuleInferrers\RequiredRuleInferrer::class,
    ],
    
    'normalizers' => [
         Spatie\LaravelData\Normalizers\ModelNormalizer::class,
         Spatie\LaravelData\Normalizers\ArrayableNormalizer::class,
         Spatie\LaravelData\Normalizers\ObjectNormalizer::class,
         Spatie\LaravelData\Normalizers\ArrayNormalizer::class,
         Spatie\LaravelData\Normalizers\JsonNormalizer::class,
    ],
    
    'wrap' => null,
    
    'var_dumper_caster_mode' => 'development',
];