fix(connection): unref the "_waitForConnect"

to not wait for this timeout to finish before the node process can exit

Author: hasezoey

lib/connection.js

@@ -842,6 +842,11 @@ Connection.prototype._waitForConnect = async function _waitForConnect() {
           },
           bufferTimeoutMS
         );
+
+        // dont cause this timeout to keep the js process alive
+        if ('unref' in timeout) {
+          timeout.unref();
+        }
       })
     ]);