Added Linux support

src/Discord.Net/project.json

@@ -38,7 +38,7 @@
     "System.Net.Http": "4.1.0",
     "System.Net.NameResolution": "4.0.0",
     "System.Net.Sockets": "4.1.0",
-    "System.Net.WebSockets.Client": "4.0.0",
+    "System.Net.WebSockets.Client": "4.0.1-beta-24410-01",
     "System.Reflection.Extensions": "4.0.1",
     "System.Runtime.InteropServices": "4.1.0",
     "System.Runtime.InteropServices.RuntimeInformation": "4.0.0",