refactor(commons): fix code quality issues (#4292)

Co-authored-by: David <[email protected]>

Author: dwrth

packages/commons/src/LRUCache.ts

@@ -80,8 +80,7 @@ class LRUCache<K, V> {
    * @param config - The configuration options for the cache
    */
   public constructor(config?: LRUCacheOptions) {
-    this.maxSize =
-      config?.maxSize !== undefined ? config.maxSize : DEFAULT_MAX_SIZE;
+    this.maxSize = config?.maxSize ?? DEFAULT_MAX_SIZE;
     this.map = new Map();
   }
 

packages/commons/src/types/middy.ts

@@ -60,7 +60,7 @@ type MiddlewareLikeObj<
 type MiddyLikeRequest = {
   event: unknown;
   context: Context;
-  response: unknown | null;
+  response: unknown;
   error: Error | null;
   internal: {
     [key: string]: unknown;