[8.x] Change exception's handler ignore method to public

[smujaddid]

Making this ignore method as public can helps when developing an app with sub-modules (package) as the main app will not always know what exception should be ignored from sub-modules.

For example, in a sub-module service provider:

// Assume this will be resolved as App\Exceptions\Handler 
// which extends Illuminate\Foundation\Exceptions\Handler
$handler = $this->app->make(\Illuminate\Contracts\Debug\ExceptionHandler::class);
$handler->ignore(\Laravel\Passport\Exceptions\OAuthServerException::class);

This way will allow sub-modules add any exception (not only its own exception, but also any other exception) that considered should be ignored for reporting. If the sub-module is not used/included in main app, then the exception will not be added to dontReport list.

Another example of handy public method in Laravel's exception handler for a sub-module is reportable and renderable

// Assume this will be resolved as App\Exceptions\Handler
// which extends Illuminate\Foundation\Exceptions\Handler
$handler = $this->app->make(\Illuminate\Contracts\Debug\ExceptionHandler::class);
$handler->reportable(function (\My\Module\Exception\InvalidUsernameException $e) {
    ...
});

Rather than creating this in App\Exceptions\Handler class:

public function dontReport(string $class)
{
    $this->ignore($class);

    return $this;
}

It is better to call ignore directly than dontReport wrapper method.

[GrahamCampbell]

This is a breaking change, and needs to go to master, if at all. You can already make this method public in your app's own exception handler by overriding the method and increasing its visibility. This is exactly why the change is breaking though, since protected methods can be overwritten to be public, but public methods cannot be overwritten to be protected.

[smujaddid]

This is a breaking change, and needs to go to master, if at all. You can already make this method public in your app's own exception handler by overriding the method and increasing its visibility. This is exactly why the change is breaking though, since protected methods can be overwritten to be public, but public methods cannot be overwritten to be protected.

I will change the target branch to master instead