Fixed Util ToUnixTimeMillisecondsPoly() to return long, since the timestamp cannot have decimal point.

Author: SparrowBrain

SpotifyAPI/Web/Util.cs

@@ -23,9 +23,9 @@ public static string GetStringAttribute<T>(this T en, string separator = "") whe
             return string.Join(separator, list);
         }
 
-        public static double ToUnixTimeMillisecondsPoly(this DateTime time)
+        public static long ToUnixTimeMillisecondsPoly(this DateTime time)
         {
-            return time.Subtract(new DateTime(1970, 1, 1)).TotalMilliseconds;
+            return (long)time.Subtract(new DateTime(1970, 1, 1)).TotalMilliseconds;
         }
     }