Allow to use ComponentName::class with emitTo method.

[mateusjunges]

This PR allows users to use the component classname when using emitTo method:

$this->emitTo(TestComponent::class, 'testEvent')

It does not introduce any breaking changes, and it's beneficial if developers want to rename components and have many emitTo calls in their projects.

2️⃣ Does it contain multiple, unrelated changes? Please separate the PRs out.
No.

3️⃣ Does it include tests, if possible? (Not a deal-breaker, just a nice-to-have)
Yes.

[calebporzio]

Thanks for the PR! I agree with this being a good addition, however I'd like to keep the implementation inline with other similar features.

See this recent PR for a good implementation: #2755

[mateusjunges]

@calebporzio Done!

[mateusjunges]

@calebporzio Actually, i don't know if you want it as it is right now or with ternary if:

if ($this->component) $output['to'] = is_subclass_of($this->component, Component::class) 
    ? $this->component::getName() 
    : $this->component;

IMHO this implementation is much more readable:

if ($this->component) {
    if (is_subclass_of($this->component, Component::class)) {
        $this->component = $this->component::getName();
    }

    $output['to'] = $this->component;
}

what are your thoughts on this?

[calebporzio]

Ternary looks better to me. Thanks!

[mateusjunges]

@calebporzio done!

[calebporzio]

Thanks!!!