Updated Syncer

Removed un-nesscary Close() as using should automatically close, and
dispose of the file handler.
Added a 100ms wait after we finish writing the file, before we unlock
the watcher, so we don't generate un-nesscary events.

FreeTubeSyncer/REST/Syncer.cs

@@ -218,8 +218,9 @@ public class Syncer<T> : ISyncer where T : class, IDataModel, new()
             foreach (var line in json)
                 fh.Write(Encoding.UTF8.GetBytes(line + "\n"));
             fh.Flush();
-            fh.Close();
         }
+
+        Task.Delay(100).Wait();
         _watcher.Locked = false;
         Log.Information("Updated {DbName}, completed in {TimeSpan}", _dbName, DateTime.Now - start);
         _isDirty = false;