[RFC] Simplify usage

[BoShurik]

$service = new OEmbed();

$result = $service->get(
    // Instead of new Uri('https://www.facebook.com/FacebookDeutschland/videos/2403439749688130/')
    'https://www.facebook.com/FacebookDeutschland/videos/2403439749688130/', 
    480,
    300,
    ['omitscript' => true]
);

echo (string)$result;

OEmbed has UriFactoryInterface instance so can create Uri by themself

[ricardofiorani]

@BoShurik Thank you for your suggestion.
Given that this breaks backward compatibility, it would be considered a major release, therefore, I'm adding the tag v2 to this issue to be considered in the future.