Support for IPv6 addresses

[Wernfried]

This nice tool should also support IPv6 addresses. In 2022 it is getting more and more relevant.

None of these are currently working:

uriObj = mongoURI.parse("mongodb://user:password@[::1]:27017/mip?authSource=admin");
uriObj = mongoURI.parse("mongodb://user:password@[fe80::81e6:5666:f147:7ef8]:27017/mip?authSource=admin");
uriObj = mongoURI.parse("mongodb://[fe80::81e6:5666:f147:7ef8]:27017/mip?authSource=admin");
uriObj = mongoURI.parse("mongodb://[::1]:27017");

See my proposal at https://github.com/Wernfried/mongodb-uri-node/blob/patch-1/mongodb-uri.js

Best Regards
Wernfried