use class, function 커맨드를 php8에서 사용할 수 있도록 수정

- \ 토큰 해석 문제
- VSCode 자동 완성 문제로 use function \sammo\{ 를 모두 해제

.phan/config.php

@@ -7,7 +7,7 @@
  */
 return [
     // Supported values: `'5.6'`, `'7.0'`, `'7.1'`, `'7.2'`, `'7.3'`,
-    // `'7.4'`, `null`.
+    // `'7.4'`, `'8.0'`, `'8.1'`, `null`.
     // If this is set to `null`,
     // then Phan assumes the PHP version which is closest to the minor version
     // of the php executable used to execute Phan.
@@ -15,9 +15,9 @@ return [
     // Note that the **only** effect of choosing `'5.6'` is to infer
     // that functions removed in php 7.0 exist.
     // (See `backward_compatibility_checks` for additional options)
-    "target_php_version" => '7.3',
-    'backward_compatibility_checks ' => false,
-    'minimum_severity'=>\Phan\Issue::SEVERITY_NORMAL,
+    "target_php_version" => '7.4',
+    'backward_compatibility_checks ' => true,
+    'minimum_severity'=>\Phan\Issue::SEVERITY_CRITICAL,
 
     'file_list' => [
         'f_config/config.php',