increase max-age for download and social badges (#6567)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

core/base-service/base.js

@@ -143,6 +143,8 @@ class BaseService {
       license: 3600,
       version: 300,
       debug: 60,
+      downloads: 900,
+      social: 900,
     }
     return cacheLengths[this.category]
   }

services/twitch/twitch.service.js

@@ -30,6 +30,8 @@ module.exports = class TwitchStatus extends TwitchBase {
     },
   ]
 
+  static _cacheLength = 30
+
   static defaultBadgeData = {
     label: 'twitch',
     namedLogo: 'twitch',