update the updater

MediaBrowser.Common.Implementations/Updates/GithubUpdater.cs

@@ -60,7 +60,11 @@ namespace MediaBrowser.Common.Implementations.Updates
             }
             else if (updateLevel == PackageVersionClass.Beta)
             {
-                obj = obj.Where(i => !i.prerelease || !i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase)).ToArray();
+                obj = obj.Where(i => !i.prerelease || i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase)).ToArray();
+            }
+            else if (updateLevel == PackageVersionClass.Dev)
+            {
+                obj = obj.Where(i => !i.prerelease || i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase) || i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase)).ToArray();
             }
 
             var availableUpdate = obj.Select(i => CheckForUpdateResult(i, minVersion, assetFilename, packageName, targetFilename)).FirstOrDefault(i => i != null);