fix: change commands for backward compat

main.liq

@@ -8,7 +8,7 @@ def print_meta(data)
   t = data["title"]
 
   message = json()
-  message.add("command", "metadataChange");
+  message.add("action", "metadataChange");
   message.add("data", { artist = a, title = t})
 
   http.post(data=message.stringify(), headers=[("Content-Type", "application/json; charset=UTF-8")], "metadata:4000")
@@ -17,14 +17,14 @@ end
 
 def live_start(_)
   message = json()
-  message.add("command", "liveStarted");
+  message.add("action", "liveStarted");
   http.post(data=message.stringify(), headers=[("Content-Type", "application/json; charset=UTF-8")], "metadata:4000")
   ()
 end
 
 def live_end()
   message = json()
-  message.add("command", "liveEnded");
+  message.add("action", "liveEnded");
   http.post(data=message.stringify(), headers=[("Content-Type", "application/json; charset=UTF-8")], "metadata:4000")
   ()
 end