Check client disconnect to exit for loop (api). Fixes #1983 (#2012)

Also update to latest melody upstream

vendor/github.com/olahol/melody/CHANGELOG.md

@@ -0,0 +1,52 @@
+## 2022-09-12 (v1.1.0)
+
+* Create Go module.
+* Update examples.
+* Fix concurrent panic (PR-65).
+* Add `Sessions` to get all sessions (PR-53).
+* Add `LocalAddr` and `RemoteAddr` (PR-55).
+
+## 2017-05-18
+
+* Fix `HandleSentMessageBinary`.
+
+## 2017-04-11
+
+* Allow any origin by default.
+* Add `BroadcastMultiple`.
+
+## 2017-04-09
+
+* Add control message support.
+* Add `IsClosed` to Session.
+
+## 2017-02-10
+
+* Return errors for some exposed methods.
+* Add `HandleRequestWithKeys`.
+* Add `HandleSentMessage` and `HandleSentMessageBinary`.
+
+## 2017-01-20
+
+* Add `Len()` to fetch number of connected sessions.
+
+## 2016-12-09
+
+* Add metadata management for sessions.
+
+## 2016-05-09
+
+* Add method `HandlePong` to melody instance.
+
+## 2015-10-07
+
+* Add broadcast methods for binary messages.
+
+## 2015-09-03
+
+* Add `Close` method to melody instance.
+
+### 2015-06-10
+
+* Support for binary messages.
+* BroadcastOthers method.