[1.x] Fixes Class API when used with multiple fragments

[nunomaduro]

This pull request fixes https://github.com/livewire/volt/issues/25 and addresses the issue with the Class API when used with multiple fragments.

The explanation might be a bit intricate, but if the blade view is already in opcache, the behavior of new class extends will differ from subsequent requests after the initial one:

// my-component.blade.php...
echo get_class(new class extends A);

// First request with op cache enabled
require 'my-component.blade.php'; // 1111
require 'my-component.blade.php'; // 2222
require 'my-component.blade.php'; // 3333

// Second request with op cache enabled
require 'my-component.blade.php'; // 1111
require 'my-component.blade.php'; // 1111
require 'my-component.blade.php'; // 1111

So, this pull request simply "invalidates" the opcache for any given blade view path that contains a class, so basically the behavior don't change between requests:

// my-component.blade.php...
echo get_class(new class extends A);

// First request with op cache enabled
require 'my-component.blade.php'; // 1111
require 'my-component.blade.php'; // 2222
require 'my-component.blade.php'; // 3333

// Second request with op cache enabled
require 'my-component.blade.php'; // 1111
require 'my-component.blade.php'; // 2222
require 'my-component.blade.php'; // 3333