Deprecation warning during installing by composer

[morawskim]

Hello,
The documentation recommends installing this library from the git repository.
But We can also use the composer. This requires one additional step because this library was not uploaded to packagist. In my composer.json file, I add the repositories key (https://getcomposer.org/doc/05-repositories.md).

....
"repositories": [
        {"type": "git", "url": "https://github.com/ShippingEasy/shipping_easy-php.git"}
    ],
....

After this step, I can require your library shippingEasy/shipping_easy-php:@dev

But I receive deprecation warning:

Deprecation warning: require.ShippingEasy/shipping_easy-php is invalid, it should not contain uppercase characters. Please use shippingeasy/shipping_easy-php instead. Make sure you fix this as Composer 2.0 will error.