Fix: ref different coroutine id on same request

[m3m0r7]

In same request, Context::getCoroutineId will return diffirent value when using it on different coroutines. This problem is easy to make a mistake when using coroutines with laravel-swoole.

For example is below:

// ...

$request1 = $sandbox->getRequest();

go(function () use ($sandbox) {
    // $request1 and $request2 are different reference because coroutine ids are not same.
    $request2 = $sandbox->getRequest();
});

// ...

and another way:

// ...

$value1 = Context::getData('foo');

go(function () use ($sandbox) {
    // $value1 and $value2 are different reference because coroutine ids are not same.
    $value2 = Context::getData('foo');
});

// ...

This PR is fixed it.

[albertcht]

Hi @m3m0r7 ,

Thanks for your pull request! I will merge this PR soon.

[m3m0r7]

Thx!