Fix "No url defined in config file" when using ESM

[drewB]

I recently ran into an issue where I could now longer migrate because I was getting the error: "ERROR: No url defined in config file! Error: No url defined in config file!".

The issue is that the code for handling importing the config file when it is ESM assumes that node will throw an error when you try to require an ESM file. That error was no longer being thrown and the returned module was all nested under default. As result, it couldn't find the url.

This PR, correctly handles this case.

Checklist

• npm test passes and has 100% coverage

[dawsayan]

@drewB Mate! You are God sent!
I was updated my node from 21 -> 22 and spent several hours trying to fix this 🐛

@reviews please kindly review and approve this PR, so that I can just use package instead of manually overwriting /app/node_modules/migrate-mongo/lib/env/config.js