Support Map.prototype.getOrInsert(), Map.prototype.getOrInsertComputed() types

[rundleman]

What version of Bun is running?

1.3.9+cf6cdbbba

What platform is your computer?

Darwin 23.2.0 arm64 arm

What steps can reproduce the bug?

The getOrInsert(), getOrInsertComputed() methods work, but they are not in the types

const options = new Map();
options.getOrInsert('theme', 'light');
console.log(options);

What is the expected behavior?

I expected no typescript errors.

What do you see instead?

ts(2339)
Property 'getOrInsert' does not exist on type 'Map<any, any>'.