fix(connection): avoid unhandled error on createConnection() if on('error') handler registered

[vkarpov15]

Fix #14377

Summary

connection.on('error', fn) should mean that openUri() errors shouldn't count as unhandled exceptions.

Examples

[wuuv]

Hi, why u not try handle errors when use await client.connect(); here:

mongoose/lib/drivers/node-mongodb-native/connection.js

Line 301 in c02141b

await client.connect();

something like: try { await client.connect(); } catch (err) { this.readyState = STATES.disconnected; this.emit('error', err); return this; }

[hasezoey]

Looks good