:bug: tweaking flatpacking for by episode

vue-theme/src/store/modules/artist.js

     const byEpisode = {}
     artistsList.forEach(artist => {
         const relatedEpisode = artist.related_episode
-        if(!Object.keys(byEpisode).includes(relatedEpisode)) {
-            byEpisode[relatedEpisode] = []
-        }
+        if(!byEpisode[relatedEpisode]) byEpisode[relatedEpisode] = []
         byEpisode[relatedEpisode].push(artist)
     })
     const flatPacked = []
         flatPacked.push({ slug: byEpisode, title: byEpisode, inbetween: true })
         byEpisode[episode].forEach(artist => flatPacked.push(artist))
     })
+    console.log('flatPacked :', flatPacked)
     return flatPacked
 }