realtime fetching: decrease default interval from 30m to 1m 🐛

I introduced this absurdly long interval in 0dba3f1.

follow-up of 0dba3f1

Author: derhuerst

lib/fetch-realtime-feed.js

@@ -18,11 +18,11 @@ const USER_AGENT = process.env.REALTIME_FETCHING_USER_AGENT || `${pkg.name} v${p
 // todo [breaking]: rename to `REALTIME_FEED_FETCH_INTERVAL_MS`
 const FETCH_INTERVAL_MS = process.env.REALTIME_FEED_FETCH_INTERVAL
 	? parseInt(process.env.REALTIME_FEED_FETCH_INTERVAL) * 1000
-	: 30 * 60 * 1000 // 30 minutes
+	: 60 * 1000 // 1 minute
 // todo [breaking]: rename to `REALTIME_FEED_FETCH_MIN_INTERVAL_MS`
 const FETCH_INTERVAL_MIN_MS = process.env.REALTIME_FEED_FETCH_MIN_INTERVAL
 	? parseInt(process.env.REALTIME_FEED_FETCH_MIN_INTERVAL) * 1000
-	: 5 * 60 * 1000 // 5 minutes
+	: 30 * 1000 // 30 seconds
 
 const logger = createLogger('realtime-data', REALTIME_FETCHING_LOG_LEVEL)