MDG and core package licences

Are all MDG and Meteor core packages MIT licensed?

I’ve seen that Meteor is MIT licensed - https://en.wikipedia.org/wiki/Meteor_(web_framework), and that some core packages e.g. accounts-base are also. But others i’m struggling to find licenses for e.g. mdg:validation-error https://github.com/meteor/validation-error.

Is it safe to assume all MDG/Meteor core work is released under MIT?

Thanks,

Tom