Update the requirement checker PHP-Scoper configuration (#426)

Closes #421

requirement-checker/scoper.inc.php

@@ -71,48 +71,21 @@ function get_prefix(): string
     'prefix' => get_prefix(),
 
     'whitelist-global-classes' => false,
+    'whitelist-global-constants' => false,
     'whitelist-global-functions' => false,
-    'whitelist' => [
-        \Composer\Semver\Semver::class,
-    ],
 
     'patchers' => [
-        // `stream_isatty()` is a PHP 7.2 function hence not defined in PHP 7.1. Unlike its function call, the string
-        // in `function_exists()` is prefixed because the name can be resolved to a FQCN and appears as a user-land
-        // function.
-        //
-        // Function whitelisting is not used here since most checks are in the form of:
-        //
-        // ```
-        // if (function_exists('stream_isatty') return @stream_isatty($stream);
-        // ```
-        //
-        // If the function is simply whitelisted, then it will check if the function `Humbug\stream_isatty` exists which
-        // it will always even though the underlying function may not exists.
-        //
-        // The following patcher can be safely removed however once https://github.com/humbug/php-scoper/issues/278 is
-        // fixed.
-        //
+        // TODO: report back the missing sapi_windows_vt100_support to JetBrains stubs
         static function (string $filePath, string $prefix, string $contents): string {
             $files = [
-                'vendor/symfony/console/Output/StreamOutput.php',
-                'vendor/symfony/phpunit-bridge/DeprecationErrorHandler.php',
-                'vendor/symfony/polyfill-php72/bootstrap.php',
-                'vendor/symfony/polyfill-php72/Php72.php',
-                'vendor/symfony/var-dumper/Dumper/CliDumper.php',
-                'vendor/composer/xdebug-handler/src/Process.php',
+                'vendor/sebastian/environment/src/Console.php',
+                'src/IO.php',
             ];
 
             if (false === in_array($filePath, $files, true)) {
                 return $contents;
             }
 
-            $contents = preg_replace(
-                '/function_exists\(\''.$prefix.'\\\\(\\\\)?stream_isatty\'\)/',
-                "function_exists('stream_isatty')",
-                $contents
-            );
-
             $contents = preg_replace(
                 '/function_exists\(\''.$prefix.'\\\\(\\\\)?sapi_windows_vt100_support\'\)/',
                 "function_exists('sapi_windows_vt100_support')",