Apply suggestions from code review

Co-authored-by: Victor Berchet <[email protected]>

Author: conico974

packages/open-next/src/overrides/incrementalCache/multi-tier-ddb-s3.ts

@@ -80,7 +80,7 @@ const multiTierCache: IncrementalCache = {
           // If the metadata is older than the local cache, we can use the local cache
           // If it's not found we assume that no write has been done yet and we can use the local cache
           const lastModified = data.Item?.revalidatedAt?.N
-            ? Number.parseInt(data.Item.revalidatedAt.N)
+            ? Number.parseInt(data.Item.revalidatedAt.N, 10)
             : 0;
           if (lastModified <= localCacheEntry.lastModified) {
             debug("Using local cache after checking ddb");

packages/open-next/src/utils/lru.ts

@@ -15,7 +15,7 @@ export class LRUCache<T> {
   set(key: string, value: any) {
     if (this.cache.size >= this.maxSize) {
       const firstKey = this.cache.keys().next().value;
-      if (firstKey) {
+      if (firstKey !== undefined) {
         this.cache.delete(firstKey);
       }
     }