[CI] Fixed build on AppVeyor

Author: Nyholm

Tests/Command/XliffLintCommandTest.php

@@ -121,9 +121,9 @@ protected function tearDown(): void
     {
         foreach ($this->files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
-        rmdir(sys_get_temp_dir().'/xliff-lint-test');
+        @rmdir(sys_get_temp_dir().'/xliff-lint-test');
     }
 }

Tests/Command/YamlLintCommandTest.php

@@ -168,9 +168,9 @@ protected function tearDown(): void
     {
         foreach ($this->files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
-        rmdir(sys_get_temp_dir().'/yml-lint-test');
+        @rmdir(sys_get_temp_dir().'/yml-lint-test');
     }
 }