fix errors

Author: mostafamaklad

src/Traits/HasPermissions.php

@@ -56,7 +56,7 @@ public function users(): BelongsToMany
      * @return $this
      * @throws GuardDoesNotMatch
      */
-    public function givePermissionTo(...$permissions): Model
+    public function givePermissionTo(...$permissions): self
     {
         $permissions = collect($permissions)
             ->flatten()
@@ -83,7 +83,7 @@ public function givePermissionTo(...$permissions): Model
      * @return $this
      * @throws GuardDoesNotMatch
      */
-    public function syncPermissions(...$permissions): Model
+    public function syncPermissions(...$permissions): self
     {
         $this->permissions()->sync([]);
 
@@ -98,7 +98,7 @@ public function syncPermissions(...$permissions): Model
      * @return $this
      * @throws \Maklad\Permission\Exceptions\GuardDoesNotMatch
      */
-    public function revokePermissionTo(...$permissions): Model
+    public function revokePermissionTo(...$permissions): self
     {
         collect($permissions)
             ->flatten()

src/Traits/HasRoles.php

@@ -104,9 +104,9 @@ public function removeRole(...$roles)
      *
      * @param array ...$roles
      *
-     * @return $this
+     * @return array|Role|string
      */
-    public function syncRoles(...$roles): Model
+    public function syncRoles(...$roles)
     {
         $this->roles()->sync([]);