update deps, add comments

Author: StarpTech

package-lock.json

@@ -62,9 +62,8 @@
   "devDependencies": {
     "@sinonjs/fake-timers": "^8.1.0",
     "@tsconfig/node12": "^1.0.9",
-    "@types/node": "^14.17.3",
-    "@types/sinonjs__fake-timers": "^8.1.0",
     "@types/node": "^17.0.5",
+    "@types/sinonjs__fake-timers": "^8.1.1",
     "abort-controller": "^3.0.0",
     "apollo-datasource-rest": "^3.4.0",
     "ava": "^3.15.0",

package.json

@@ -92,7 +92,10 @@ export abstract class HTTPDataSource<TContext = any> extends DataSource {
   constructor(public readonly baseURL: string, private readonly options?: HTTPDataSourceOptions) {
     super()
     this.memoizedResults = new QuickLRU({
+      // The maximum number of items before evicting the least recently used items.
       maxSize: this.options?.lru?.maxSize ? this.options.lru.maxSize : 100,
+      // The maximum number of milliseconds an item should remain in cache.
+      // By default maxAge will be Infinity, which means that items will never expire.
       maxAge: this.options?.lru?.maxAge,
     })
     this.pool = options?.pool ?? new Pool(this.baseURL, options?.clientOptions)