Fix JSON GET calls with the route helper

[GeniJaho]

Fixes #217.

This PR will ensure that the route() helper will receive the $data argument, which should produce the same behavior.

Some cases taken into account:

$http->json('GET', route('home'));
$http->json('GET', route('home'), ['payload']);
$http->json('GET', route('home'), data: ['payload']);
$http->json('GET', route('home', 'some arg'), ['payload']);
$http->json('GET', '/', ['data'], ['headers'], 1);
$http->json('GET', '/', ['data'], ['headers']);
$http->json('GET', '/', ['data']);
$http->json('GET', route('home'), headers: ['payload']);
$http->json('GET', route('home'), options: 1);