Add MockeryExceptionInterface (#1217)

Signed-off-by: Nathanael Esayeas <nathanael.esayeas@protonmail.com>

library/Mockery/CountValidator/Exception.php

@@ -20,6 +20,8 @@
 
 namespace Mockery\CountValidator;
 
-class Exception extends \OutOfBoundsException
+use Mockery\Exception\MockeryExceptionInterface;
+
+class Exception extends \OutOfBoundsException implements MockeryExceptionInterface
 {
 }

library/Mockery/Exception.php

@@ -20,6 +20,8 @@
 
 namespace Mockery;
 
-class Exception extends \UnexpectedValueException
+use Mockery\Exception\MockeryExceptionInterface;
+
+class Exception extends \UnexpectedValueException implements MockeryExceptionInterface
 {
 }

library/Mockery/Exception/BadMethodCallException.php

@@ -2,7 +2,7 @@
 
 namespace Mockery\Exception;
 
-class BadMethodCallException extends \BadMethodCallException
+class BadMethodCallException extends \BadMethodCallException implements MockeryExceptionInterface
 {
     private $dismissed = false;
 

library/Mockery/Exception/InvalidArgumentException.php

@@ -20,6 +20,6 @@
 
 namespace Mockery\Exception;
 
-class InvalidArgumentException extends \InvalidArgumentException
+class InvalidArgumentException extends \InvalidArgumentException implements MockeryExceptionInterface
 {
 }

library/Mockery/Exception/MockeryExceptionInterface.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mockery\Exception;
+
+use Throwable;
+
+interface MockeryExceptionInterface extends Throwable
+{
+}

library/Mockery/Exception/RuntimeException.php

@@ -20,6 +20,6 @@
 
 namespace Mockery\Exception;
 
-class RuntimeException extends \Exception
+class RuntimeException extends \Exception implements MockeryExceptionInterface
 {
 }