Update vendor (#1461)

* Update vendored libs

* Fix slack api changes

vendor/github.com/labstack/echo/v4/middleware/timeout.go

@@ -42,8 +42,8 @@ var (
 	}
 )
 
-// Timeout returns a middleware which recovers from panics anywhere in the chain
-// and handles the control to the centralized HTTPErrorHandler.
+// Timeout returns a middleware which returns error (503 Service Unavailable error) to client immediately when handler
+// call runs for longer than its time limit. NB: timeout does not stop handler execution.
 func Timeout() echo.MiddlewareFunc {
 	return TimeoutWithConfig(DefaultTimeoutConfig)
 }
@@ -106,6 +106,11 @@ func (t echoHandlerFuncWrapper) ServeHTTP(rw http.ResponseWriter, r *http.Reques
 	// so on timeout writer stays what http.TimeoutHandler uses and prevents writing headers/body
 	t.ctx.Response().Writer = originalWriter
 	if err != nil {
+		// call global error handler to write error to the client. This is needed or `http.TimeoutHandler` will send status code by itself
+		// and after that our tries to write status code will not work anymore
+		t.ctx.Error(err)
+		// we pass error from handler to middlewares up in handler chain to act on it if needed. But this means that
+		// global error handler is probably be called twice as `t.ctx.Error` already does that.
 		t.errChan <- err
 	}
 }