psalm/bin/composer-require-checker-config.json

{
  "symbol-whitelist" : [
    "null", "true", "false",
    "static", "self", "parent",
    "array", "string", "int", "float", "bool", "iterable", "callable", "void", "object",
    "igbinary_serialize", "igbinary_unserialize", "PHP_PARSER_VERSION", "PSALM_VERSION", "runkit_object_id",
    "sapi_windows_cp_is_utf8", "ReflectionUnionType",
    "Composer\\Autoload\\ClassLoader"
  ],
  "php-core-extensions" : [
    "Core",
    "date",
    "pcre",
    "Phar",
    "Reflection",
    "SPL",
    "standard",
    "pcntl",
    "posix",
    "filter",
    "curl",
    "PDO"
  ],
  "scan-files" : []
}