Fixed missing enum dependency

Used Taha Amin Ghafuri's (@tahaghafuri ) fork to replace the missing "cedx/enum" package with the "myclabs/php-enum" package

composer.json

@@ -25,7 +25,7 @@
     "php": ">=7.2.0",
     "ext-curl": "*",
     "ext-json": "*",
-    "cedx/enum": "^7.4.0",
+    "myclabs/php-enum": "^1.8",
     "guzzlehttp/guzzle": "~6.0"
   },
   "require-dev": {

src/Model/Owner.php

@@ -203,7 +203,7 @@ class Owner extends AbstractApiModel {
         return $this;
     }
 
-    public function getIsAdmin(): boolean {
+    public function getIsAdmin(): bool {
         return $this->isAdmin;
     }
 

src/Model/StatusState.php

@@ -1,11 +1,13 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
+
 namespace Gitea\Model;
 
-use Enum\{EnumTrait};
+use MyCLabs\Enum\Enum;
 
 /** Defines the state of a Gitea status. */
-final class StatusState {
-    use EnumTrait;
+final class StatusState extends Enum {
 
     /** @var string The status is an error. */
     const error = 'error';

src/Model/TeamPermission.php

@@ -1,11 +1,10 @@
 <?php declare(strict_types=1);
 namespace Gitea\Model;
 
-use Enum\{EnumTrait};
+use MyCLabs\Enum\Enum;
 
 /** Defines the permission of a team. */
-final class TeamPermission {
-    use EnumTrait;
+final class TeamPermission extends Enum {
 
     /** @var string The team has the administrator permission. */
     const admin = 'admin';