Use ?. where it represents the intended semantics (#11512)

packages/babel-core/src/config/files/configuration.js

@@ -71,8 +71,9 @@ export function* findRelativeConfig(
         loc,
         envName,
         caller,
-        packageData.pkg && packageData.pkg.dirname === loc
-          ? packageToBabelConfig(packageData.pkg)
+        packageData.pkg?.dirname === loc
+          ? // $FlowIgnore - packageData.pkg is not null
+            packageToBabelConfig((packageData.pkg: ConfigFile))
           : null,
       );
     }

packages/babel-core/src/config/index.js

@@ -17,7 +17,8 @@ export type { PartialConfig } from "./partial";
 
 const loadOptionsRunner = gensync<[mixed], Object | null>(function*(opts) {
   const config = yield* loadFullConfig(opts);
-  return config ? config.options : null;
+  // NOTE: We want to return "null" explicitly, while ?. alone returns undefined
+  return config?.options ?? null;
 });
 
 const maybeErrback = runner => (opts: mixed, callback: Function) => {