feat: expire changelog cache after 1 hour

lib/workers/pr/changelog/source-cache.js

@@ -22,19 +22,18 @@ async function getChangeLogJSON(args) {
     const cacheVal = await cacache.get(...cache);
     logger.trace(`Returning cached version of ${depName}`);
     const cachedResult = JSON.parse(cacheVal.data.toString());
-    if (cachedResult) {
-      if (DateTime.local() < DateTime.fromISO(cachedResult.expiry)) {
-        logger.debug('Cache hit');
-        delete cachedResult.expiry;
-        return cachedResult;
-      }
-      logger.debug('Cache expiry');
+    if (
+      cachedResult &&
+      DateTime.local() < DateTime.fromISO(cachedResult.expiry)
+    ) {
+      logger.debug('Cache hit');
+      delete cachedResult.expiry;
+      return cachedResult;
     }
-    return null;
   } catch (err) {
     logger.debug('Cache miss');
-    return null;
   }
+  return null;
 }
 
 async function setChangeLogJSON(args, res) {