Add provider for fakerphp/faker

[dezer32]

Fast test data generation from enum.
Used with phpfaker/faker.

Installation:

$faker = Factory::create();
$faker->addProvider(MyCLabs\Enum\Faker\FakerEnumProvider\FakerEnumProvider::class);

Usage:

$faker->randomEnum(AnotherEnum::class); //random enum object
$faker->randomEnumValue(AnotherEnum::class); //random enum value
$faker->randomEnumKey(AnotherEnum::class); //random enum key