Laravel components v8 (#2576)

- update actions ci
- include json for 4 spaces tab
- provide output int for process code exit
- adhere to parent type hint of builder
- mailer instance now needs a name, multiple can be instantiated
- getOriginal now uses mutators in the model
- Temporarily loosen MailableInterface requirements. This avoids an immediate BC break for classes in extensions that implement this interface.
- Temporarily provide (and autoload) old symfony translator interface
- make queue exception handler compatible with the contract of L8
- Update phpunit schema for newer version
- Update phpunit assert calls for newer version

src/Queue/ExceptionHandler.php

@@ -12,6 +12,7 @@ namespace Flarum\Queue;
 use Exception;
 use Illuminate\Contracts\Debug\ExceptionHandler as ExceptionHandling;
 use Psr\Log\LoggerInterface;
+use Throwable;
 
 class ExceptionHandler implements ExceptionHandling
 {
@@ -28,10 +29,10 @@ class ExceptionHandler implements ExceptionHandling
     /**
      * Report or log an exception.
      *
-     * @param  \Exception $e
+     * @param  Throwable $e
      * @return void
      */
-    public function report(Exception $e)
+    public function report(Throwable $e)
     {
         $this->logger->error((string) $e);
     }
@@ -40,10 +41,10 @@ class ExceptionHandler implements ExceptionHandling
      * Render an exception into an HTTP response.
      *
      * @param  \Illuminate\Http\Request $request
-     * @param  \Exception               $e
+     * @param  Throwable               $e
      * @return \Symfony\Component\HttpFoundation\Response
      */
-    public function render($request, Exception $e)
+    public function render($request, Throwable $e)
     {
         // TODO: Implement render() method.
     }
@@ -52,10 +53,10 @@ class ExceptionHandler implements ExceptionHandling
      * Render an exception to the console.
      *
      * @param  \Symfony\Component\Console\Output\OutputInterface $output
-     * @param  \Exception                                        $e
+     * @param  Throwable                                        $e
      * @return void
      */
-    public function renderForConsole($output, Exception $e)
+    public function renderForConsole($output, Throwable $e)
     {
         // TODO: Implement renderForConsole() method.
     }
@@ -63,10 +64,10 @@ class ExceptionHandler implements ExceptionHandling
     /**
      * Determine if the exception should be reported.
      *
-     * @param  \Exception $e
+     * @param  Throwable $e
      * @return bool
      */
-    public function shouldReport(Exception $e)
+    public function shouldReport(Throwable $e)
     {
         return true;
     }