Merge pull request #8839 from GiedriusGrabauskas/patch-7

SignalR Updated: Added source param in ConnectionError

signalr/signalr.d.ts

@@ -180,6 +180,7 @@ declare namespace SignalR {
     interface ConnectionError extends Error {
         context: ConnectionErrorContext;
         transport?: string;
+        source?: string;
     }
 
     interface Connection {