solution: support basic auth for websockets

src/test/groovy/io/emeraldpay/dshackle/config/UpstreamsConfigReaderSpec.groovy

@@ -31,6 +31,11 @@ class UpstreamsConfigReaderSpec extends Specification {
                 rpc.url == new URI("http://localhost:8545")
                 ws != null
                 ws.url == new URI("ws://localhost:8546")
+                ws.basicAuth != null
+                with(ws.basicAuth) {
+                    username == "9c199ad8f281f20154fc258fe41a6814"
+                    password == "258fe4149c199ad8f2811a68f20154fc"
+                }
             }
         }
         with(act.upstreams.get(1)) {

src/test/resources/upstreams-basic.yaml

@@ -16,6 +16,9 @@ upstreams:
         ws:
           url: "ws://localhost:8546"
           origin: "http://localhost"
+          basic-auth:
+            username: 9c199ad8f281f20154fc258fe41a6814
+            password: 258fe4149c199ad8f2811a68f20154fc
   - id: infura
     chain: ethereum
     connection: