update packages

MediaBrowser.Server.Mac/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Mono.Posix" version="4.0.0.0" targetFramework="net45" />
-  <package id="SkiaSharp" version="1.57.1" targetFramework="net462" />
+  <package id="SkiaSharp" version="1.58.0" targetFramework="net462" />
 </packages>