main: make bandcamp command use bandcamp library to avoid panics

src/prediction.rs

@@ -51,7 +51,7 @@ struct BandcampQueryArgs {
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
-enum BandcampResult {
+pub enum BandcampResult {
     Artist { name: String, bio: Option<String>, location: Option<String> },
     Album { title: String, about: Option<String>, credits: Option<String>, release_date: DateTime<Utc>, artist: String }
 }