src: silence compiler warning

This commit fixes the following warning:

warning: missing field 'exports' initializer

PR-URL: #28764
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

Author: cjihrig

src/module_wrap.cc

@@ -646,7 +646,7 @@ Maybe<const PackageConfig*> GetPackageScopeConfig(Environment* env,
     if (pjson_url.path() == last_pjson_url.path()) {
       auto entry = env->package_json_cache.emplace(pjson_url.ToFilePath(),
           PackageConfig { Exists::No, IsValid::Yes, HasMain::No, "",
-                          PackageType::None });
+                          PackageType::None, Global<Value>() });
       const PackageConfig* pcfg = &entry.first->second;
       return Just(pcfg);
     }