Allow \Throwable $previous everywhere

Author: fancyweb

Exception/FormatException.php

@@ -20,7 +20,7 @@ final class FormatException extends \LogicException implements ExceptionInterfac
 {
     private $context;
 
-    public function __construct(string $message, FormatExceptionContext $context, int $code = 0, \Exception $previous = null)
+    public function __construct(string $message, FormatExceptionContext $context, int $code = 0, \Throwable $previous = null)
     {
         $this->context = $context;
 

Exception/PathException.php

@@ -18,7 +18,7 @@
  */
 final class PathException extends \RuntimeException implements ExceptionInterface
 {
-    public function __construct(string $path, int $code = 0, \Exception $previous = null)
+    public function __construct(string $path, int $code = 0, \Throwable $previous = null)
     {
         parent::__construct(sprintf('Unable to read the "%s" environment file.', $path), $code, $previous);
     }