fix(connection): call setMaxListeners(0) on MongoClient to avoid ev…

…ent emitter memory leak warnings with `useDb()`

Fix #10762

lib/connection.js

@@ -832,6 +832,7 @@ Connection.prototype.openUri = function(uri, options, callback) {
   const promise = new Promise((resolve, reject) => {
     const client = new mongodb.MongoClient(uri, options);
     _this.client = client;
+    client.setMaxListeners(0);
     client.connect((error) => {
       if (error) {
         return reject(error);